Harman DJ Equipment 1210KA User Manual

USER GUIDE  
®
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User Guide  
1
Soundcraft EFX/EPM User Guide Issue 1210  
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IMPORTANT  
Please read this manual carefully before using  
your mixer for the first time.  
This equipment complies with the EMC directive  
2004/108/EC  
and LVD 2006/95/EC  
This product is approved to safety standards:  
EFX Models  
IEC 60065: 2001 + AMD1:2005  
EN60065: 2002 + AMD1:2006+A11:2008  
UL6500 7th Edition: 2003  
CAN/CSA-E60065-03  
and EMC standards:  
EN55103-1: 1996 (E2)  
EN55103-2: 1996 (E2)  
EPM Models  
For further details contact  
Harman International Industries Ltd.  
Cranborne House, Cranborne Road,  
Potters Bar, Hertfordshire, EN6 3JN UK  
© Harman International Industries Ltd. 2010  
All rights reserved. Parts of the design of this product may be protected by worldwide patents.  
Part No. BD10.530000 Issue 1210KA  
Soundcraft is a trading division of Harman International Industries Ltd.Information in this manual  
is subject to change without notice and does not represent a commitment on the part of the  
vendor. Soundcraft shall not be liable for any loss or damage whatsoever arising from the use  
of information or any error contained in this manual.  
No part of this manual may be reproduced, stored in a retrieval system, or transmitted, in  
any form or by any means, electronic, electrical, mechanical, optical, chemical, including  
photocopying and recording,for any purpose without the express written permission of Soundcraft.  
Harman International Industries Limited  
Cranborne House, Cranborne Road, POTTERS BAR,  
Hertfordshire, EN6 3JN, UK  
Tel: +44 (0)1707 665000  
®
Fax: +44 (0)1707 660742  
E & OE.  
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Contents  
SAFETY SYMBOL GUIDE...................................................................................................4  
IMPORTANT SAFETY INSTRUCTIONS.............................................................................5  
INTRODUCTION.............................................................................................7  
OVERVIEW.................................................................................................8  
THE 60-SECOND GUIDE - EFX............................................................................................8  
THE 60-SECOND GUIDE - EPM.........................................................................................10  
WIRING UP..........................................................................................................................12  
BLOCK DIAGRAM - Soundcraft EFX...................................................................................16  
BLOCK DIAGRAM - Soundcraft EPM..................................................................................17  
MONO INPUT CHANNEL - EFX shown...............................................................................18  
STEREO INPUT CHANNELS (EFX shown).........................................................................21  
MASTER SECTION (EFX)...................................................................................................24  
Lexicon® FX PROCESSOR OVERVIEW (EFX only)..........................................................27  
FX OPERATION...................................................................................................................27  
FX PROCESSOR CONTROLS (EFX only)..........................................................................28  
REVERBS ...........................................................................................................................29  
REVERB CONTROLS.........................................................................................................30  
DELAYS...............................................................................................................................31  
DELAY CONTROLS ............................................................................................................32  
MODULATED EFFECTS......................................................................................................32  
FACTORY RESET ...............................................................................................................34  
EFFECTS DATA CHART (EFX only)....................................................................................35  
USING YOUR EFX OR EPM CONSOLE.............................................................................36  
APPLICATIONS....................................................................................................................38  
GLOSSARY...........................................................................................................................42  
TYPICAL CONNECTING LEADS.........................................................................................44  
MARK-UP SHEETS - EFX...................................................................................................46  
MARK-UP SHEETS - EPM..................................................................................................48  
FITTING OPTIONAL RACKMOUNT EARS.........................................................................50  
EPM/EFX TYPICAL SPECIFICATIONS...............................................................................52  
WARRANTY.........................................................................................................................54  
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For your own safety and to avoid invalidation of the warranty please read this  
section carefully.  
SAFETY SYMBOL GUIDE  
For your own safety and to avoid invalidation of the warranty all text marked  
with these symbols should be read carefully.  
WARNINGS  
The lightning flash with arrowhead symbol, is intended to  
alert the user to the presence of un-insulated “dangerous  
voltage” within the product’s enclosure that may be of suf-  
ficient magnitude to constitute a risk of electric shock to  
persons.  
CAUTIONS  
The exclamation point within an equilateral triangle is in-  
tended to alert the user to the presence of important operat-  
ing and maintenance (servicing) instructions in the literature  
accompanying the appliance.  
NOTES  
Contain important information and useful tips on the opera-  
tion of your equipment.  
HEADPHONES SAFETY WARNING  
Contain important information and useful tips on headphone  
outputs and monitoring levels.  
Recommended Headphone Impedance >= 150 Ohms.  
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IMPORTANT SAFETY INSTRUCTIONS  
Read these instructions.  
Keep these instructions.  
Heed all warnings.  
Follow all instructions.  
Do not use this apparatus near water.  
Clean only with a dry cloth.  
Do not block any ventilation openings. Install in accordance with the manufacturer’s  
instructions.  
Do not install near any heat sources such as radiators, heat registers, stoves, or other  
apparatus (including amplifiers) that produce heat.  
Do not defeat the safety purpose of a polarised or grounding type plug. A polarised  
plug has two blades with one wider than the other. A grounding type plug has two  
blades and a third grounding prong. The wide blade or the third prong are provided  
for your safety. If the provided plug does not fit into your outlet, consult an electrician  
for replacement of the obsolete outlet  
Protect the power cord from being walked on or pinched particularly at plugs, conven-  
ience receptacles and the point where they exit from the apparatus.  
Only use attachments/accessories specified by the manufacturer.  
Use only with the cart, stand, tripod, bracket or table specified by the manufacturer,  
or sold with the apparatus. When a cart is used, use caution when moving the cart/  
apparatus combination to avoid injury from tip-over.  
Unplug this apparatus during lightning storms or when unused for long periods of  
time.  
Refer all servicing to qualified service personnel. Servicing is required when the ap-  
paratus has been damaged in any way, such as power-supply cord or plug is damaged,  
liquid has been spilled or objects fallen into the apparatus, the apparatus has been  
exposed to rain or moisture, does not operate normally, or has been dropped.  
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Note: It is recommended that all maintenance and service on the product should be  
carried out by Soundcraft or its authorised agents. Soundcraft cannot accept any li-  
ability whatsoever for any loss or damage caused by service, maintenance or repair by  
unauthorised personnel.  
WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to  
rain or moisture.  
Do not expose the apparatus to dripping or splashing and do not place objects filled with  
liquids, such as vases, on the apparatus.  
No naked flame sources, such as lighted candles, should be placed on the apparatus.  
Ventilation should not be impeded by covering the ventilation openings with items such  
as newspapers, table cloths, curtains etc.  
THIS APPARATUS MUST BE EARTHED. Under no circumstances should the safety earth be  
disconnected from the mains lead.  
The mains supply disconnect device is the mains plug. It must remain accessible so as  
to be readily operable when the apparatus is in use.  
If any part of the mains cord set is damaged, the complete cord set should be replaced.  
The following information is for reference only.  
The wires in the mains lead are coloured in accordance with the following code:  
Earth (Ground): Green and Yellow (US - Green/Yellow)  
Neutral:  
Live (Hot):  
Blue (US - White)  
Brown (US - Black)  
As the colours of the wires in the mains lead may not correspond with the coloured mark-  
ings identifying the terminals in your plug, proceed as follows:  
The wire which is coloured Green and Yellow must be connected to the terminal in  
the plug which is marked with the letter E or by the earth symbol.  
The wire which is coloured Blue must be connected to the terminal in the plug which  
is marked with the letter N  
The wire which is coloured Brown must be connected to the terminal in the plug  
which is marked with the letter L  
Ensure that these colour codes are followed carefully in the event of the plug being  
changed  
This unit is capable of operating over a range of mains voltages as marked on the rear  
panel.  
NOTE: This equipment has been tested and found to comply with the limits for a Class A  
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide  
reasonable protection against harmful interference when the equipment is operated in  
a commercial environment. This equipment generates, uses and can radiate radio fre-  
quency energy and, if not installed and used in accordance with the instruction manual,  
may cause harmful interference to radio communications. Operation of this equipment  
in a residential area is likely to cause harmful interference in which case the user will be  
required to correct the interference at his own expense.  
This ClassA digital apparatus meets the requirements of the Canadian Interference-Causing  
Equipment Regulations.  
Cet appareil numérique de la Classe A respecte toutes les exigences du Règlement sur  
le matériel brouilleur du Canada.  
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INTRODUCTION  
Thank you for purchasing a Soundcraft EFX/EPM mixer. The EFX/EPM range  
is a most cost-effective mixing solution, bringing you all the features and  
performance that you expect from a Soundcraft product, at an extraordinarily  
low price. The packaging, in which your mixer arrived, forms part of the product  
and must be retained for future use.  
Owning a Soundcraft console brings you the expertise and support of one of  
the industry’s leading manufacturers, and the results of nearly 3 decades of  
supporting some of the biggest names in the business. Our knowledge has  
been attained through working in close contact with leading professionals and  
institutes to bring you products designed to get the best possible results from  
your mixing.  
Built to the highest standards using quality components and surface mount  
technology, the mixer is designed to be as easy to use as possible. We have  
spent years researching the most efficient methods of control for two key reasons:  
1) Engineers, musicians, writers and programmers all need to have very few  
interruptions to the creative process; our products have been designed to be  
almost transparent, allowing this process to breathe.  
2) Whether performing or recording, time is a very expensive and rare commod-  
ity. Our products have a user interface which is recognised by millions to be the  
industry standard because of its efficiency.  
The sonic qualities of our products are exemplary - some of the same circuits  
which are used on our most expensive consoles are employed in the EFX and  
EPM,bringing you the great Soundcraft quality in a small format console without  
compromise.  
You will also be glad to know you have a one year warranty with your product  
from the date of purchase. The mixer has been designed using the latest high-  
end software based engineering packages. Every console from Soundcraft has  
been proven to stand up to all the stress and rigours of modern day mixing  
environments.  
The entire mixer is manufactured using some of the most advanced techniques  
in the world, from high density surface mount PCB technology, to computer  
aided test equipment able to measure signals well outside the range of normal  
hearing. As each console passes through to be quality checked before packing,  
there is also a human listening station. Something we have learnt over the years  
is that the human touch counts - and only by using people can you ensure the  
product meets the high demands of the user.  
ADVICE FOR THOSE WHO PUSH THE BOUNDARIES  
Although your new console will not output any sound until you feed it signals, it  
has the capability to produce sounds which when monitored through an ampli-  
fier or headphones can damage hearing over time.  
Please take care when working with your audio - if you are manipulating controls  
which you don’t understand (which we all do when we are learning), make sure  
your monitors are turned down.Remember that your ears are the most important  
tool of your trade, look after them, and they will look after you.  
Most importantly - don’t be afraid to experiment to find out how each parameter  
affects the sound - this will extend your creativity and help you to get the best  
from your mixer and the most respect from your artists and audience.  
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OVERVIEW  
To get you working as fast as possible, this manual begins with a 60-second guide. Here you can find quick  
information on any feature of the EFX console.  
BANK  
A
KARAOKE  
THE 60-SECOND GUIDE - EFX  
1 MIC INPUT (XLR)  
Connect Microphones here. If you are using a condenser mic,ensure phantom  
power is supplied by pressing the switch at the top of the master section.  
WARNING: Do Not apply Phantom Power before connecting a  
microphone.  
2 LINE INPUT (¼” Jack)  
3 INSERT POINT (¼” Jack)  
4 GAIN CONTROL  
5 EQ STAGE  
Connect Line level sources here, e.g. Synth, Drum Machine, DI etc.  
Connect Signal processors here, e.g. Compressor, Gate etc.  
Adjust this to increase or decrease the level of the incoming signal.  
Adjust these controls to change the signal tone (the character of the signal).  
Adjust this control to change the level of the signal to an artist’s monitors  
(headphones/in-ear/stage monitors). Aux 1 is globally switchable pre/post  
fade.  
6 AUX 1 SEND  
7 FX SEND  
This control sets the level of the post-fade signal being sent to the FX bus;  
from there it is routed to the FX processor.  
8 PAN CONTROL  
9 MUTE SWITCH  
Use this control to position the signal within the stereo field.  
When this is pressed you will hear no signal from the channel (post-mute  
signals).  
10 PFL  
When pressed the signal will appear on the monitor and headphone outputs  
- use this to monitor the post-EQ signal from the channel.  
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11 PEAK LED  
This is used to indicate that the signal is close to distorting (clipping) on a  
specific channel.  
12 INPUT CHANNEL FADER  
13 MIX OUTPUTS (XLR) &  
MONO OUT (¼” Jack)  
This is used to control the level fed to the Mix Bus and post-fade sends.  
Connect these to your analogue recording device, or to your amplification  
system.  
14 MIX INSERTS (¼” Jack) This is a pre-fade break in the signal path which can be used to feed a  
dynamics or mastering device.The signal is sent from the tip of the jack plug  
and the return path comes back in on the ring of the jack plug.  
15 MONITOR O/Ps (¼” Jack) These are used to feed your monitoring system.This can be directly connected  
to powered monitors, or indirectly via an amplifier to standard monitors.  
16 MASTER FADERS  
17 MAIN METERS  
These faders control the overall level of the mix outputs.  
These show the level of the mix outputs. When the PFL ACTIVE LED is lit, the  
meters show the level of the selected PFL signal.  
18 MONITOR CONTROL  
19 PHONES CONTROL  
This controls the level of the signal sent to your monitoring system.  
This controls the level of the signal sent to the headphones jack socket.  
20 AUX 1 OUTPUT (¼” Jack) This output can be used to send the channel signal to an artist’s monitors  
(headphones/in-ear/stage monitors). It is switchable pre/post fade.  
21 AUX CONTROL  
This switch globally switches the AUX1 feed on all the input modules to be  
either pre or post-fade.  
22 STEREO INPUTS (¼” Jack) These two inputs can be used to connect line level stereo inputs from key-  
boards, sound modules, samplers, computer based audio cards etc. These  
inputs pass through a normal channel strip, with EQ, Auxes and a Balance  
control.  
23 2-TRACK INPUTS  
(RCA Phono)  
Here you can connect the playback from your recording device.  
24 2-TRACK CONTROLS  
Use these to control the 2Track signal.The MONITOR switch sends the signal  
to the monitor outputs and phones, whilst the TO MIX switch sends it to the  
main mix.  
25 RECORD OUTPUTS  
(RCA Phono)  
You can connect these to the inputs of your recording device.  
26 PHANTOM POWER  
Press this to switch the phantom power (48V) on for condenser microphones.  
WARNING: Do Not apply Phantom Power before connecting a  
microphone.  
27 HEADPHONES (¼” Jack) Plug your headphones into this socket. Recommended headphones imped-  
ance is 150 ohms or greater.  
28 STEREO RETURN INPUTS This pair of inputs accept 3-pole A’ gauge (TRS) jacks. Use these inputs for  
sources such as keyboards, drum machines, synths or CDs. The inputs are  
BALANCED. Mono sources may be used by plugging into the left jack only.  
29 STEREO RETURN CONTROL This control sets the level of signal routed to the main mix busses. There is  
an associated PK LED to warn of signals which are too high.  
30 FX BUS OUTPUT  
This output carries the signal from the FX bus. It could be used as a second  
Aux Output if desired, if the FX Processor is not needed at the time. The FX  
sends on the inputs channels to the FX bus are always post-fade.  
31 FOOTSWITCH CONNECTOR This is used by the FX Processor, see page 26.  
32 LEXICON® FX PROCESSOR See the information starting on page 27  
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THE 60-SECOND GUIDE - EPM  
1 MIC INPUT (XLR)  
Connect Microphones here. If you are using a condenser mic,ensure phantom  
power is supplied by pressing the switch at the top of the master section.  
WARNING: Do Not apply Phantom Power before connecting  
a microphone.  
2 LINE INPUT (¼” Jack)  
3 INSERT POINT (¼” Jack)  
4 GAIN CONTROL  
5 EQ STAGE  
6 AUX 1/2 SENDS  
Connect Line level sources here, e.g. Synth, Drum Machine, DI etc.  
Connect Signal processors here, e.g. Compressor, Gate etc.  
Adjust this to increase or decrease the level of the incoming signal.  
Adjust these controls to change the signal tone (the character of the signal).  
Adjust these controls to change the level of the signal to an artist’s monitors  
(headphones/in-ear/stage monitors). Each Aux is globally switchable pre/  
post fade.  
7 PAN CONTROL  
8 MUTE SWITCH  
Use this control to position the signal within the stereo field.  
When this is pressed you will hear no signal from the channel (post-mute  
signals).  
9 PFL  
When pressed the signal will appear on the monitor and headphone outputs  
- use this to monitor the post-EQ signal from the channel.  
10  
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10 PEAK LED  
This is used to indicate that the signal is close to distorting (clipping) on a  
specific channel.  
11 INPUT CHANNEL FADER  
12 MIX OUTPUTS (XLR) &  
MONO OUT (¼” Jack)  
This is used to control the level fed to the Mix Bus and post-fade sends.  
Connect these to your analogue recording device, or to your amplification  
system.  
13 MIX INSERTS (¼” Jack) This is a pre-fade break in the signal path which can be used to feed a dy-  
namics or mastering device. The signal is sent from the tip of the jack plug  
and the return path comes back in on the ring of the jack plug.  
14 MONITOR O/Ps (¼” Jack) These are used to feed your monitoring system.This can be directly connected  
to powered monitors, or indirectly via an amplifier to standard monitors.  
15 MASTER FADERS  
16 MAIN METERS  
These faders control the overall level of the mix outputs.  
These show the level of the mix outputs. When the PFL ACTIVE LED is lit, the  
meters show the level of the selected PFL signal.  
17 MONITOR CONTROL  
18 PHONES CONTROL  
This controls the level of the signal sent to your monitoring system.  
This controls the level of the signal sent to the headphones jack socket.  
19 AUX OUTPUTS (¼” Jack) These outputs can be used to send the channel signal to an artist’s monitors  
(headphones/in-ear/stage monitors). They are switchable pre/post fade.  
20 AUX CONTROL  
These switches globally switch the AUX1 and AUX 2 feeds on all the input  
modules to be either pre or post-fade.  
21 STEREO INPUTS (¼” Jack) These two inputs can be used to connect line level stereo inputs from key-  
boards, sound modules, samplers, computer based audio cards etc. These  
inputs pass through a normal channel strip, with EQ, Auxes and a Balance  
control.  
22 2-TRACK INPUTS  
(RCA Phono)  
Here you can connect the playback from your recording device.  
23 2-TRACK CONTROLS  
Use these to control the 2Track signal.The MONITOR switch sends the signal  
to the monitor outputs and phones, whilst the TO MIX switch sends it to the  
main mix.  
24 RECORD OUTPUTS  
(RCA Phono)  
You can connect these to the inputs of your recording device.  
25 PHANTOM POWER  
Press this to switch the phantom power (48V) on for condenser microphones.  
WARNING: Do Not apply Phantom Power before connecting a  
microphone.  
26 HEADPHONES (¼” Jack) Plug your headphones into this socket. Recommended headphones  
impedance is 150 ohms or greater.  
11  
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WIRING UP  
Mic Input  
The MIC input accepts XLR-type connectors and is designed to suit a wide  
range of BALANCED or UNBALANCED low-level signals, whether from  
delicate vocals requiring the best low-noise performance, or drum kits  
needing maximum headroom. Professional dynamic, condenser or rib-  
bon mics are best because these will be LOW IMPEDANCE. While you can  
use low-cost HIGH IMPEDANCE mics, you do not get the same degree of  
immunity to interference on the microphone cable and as a result the level  
of background noise may be higher. If you turn the PHANTOM POWER on,  
the socket provides a suitable powering voltage for professional condenser  
mics.  
DO NOT use UNBALANCED sources with the phantom power  
switched on. The voltage on pins 2 & 3 of the XLR connector may  
cause serious damage. BALANCED dynamic mics may normally be  
used with phantom power switched on (contact your microphone  
manufacturer for guidance)  
The input level is set using the input GAIN knob.  
The LINE input offers the same gain range as the MIC input, but at a higher  
input impedance, and is 20dB less sensitive. This is suitable for most line  
level sources.  
WARNING !  
Start with the input GAIN knob turned fully anticlockwise when  
plugging high level sources into the LINE input to avoid overloading  
the input channel or giving you a very loud surprise!  
Line Input  
Accepts 3-pole A’ gauge jacks, or 2-pole mono jacks which will automati-  
cally ground the ‘cold’ input. Use this input for sources other than mics,  
such as keyboards, drum machines, synths, tape machines or DI boxes.  
The input is BALANCED for low noise and immunity from interference,  
but you can use UNBALANCED sources by wiring up the jacks as shown,  
although you should then keep cable lengths as short as possible to  
minimise interference pick-up on the cable. Note that the ring must be  
grounded if the source is unbalanced. Set the input level using the GAIN  
knob, starting with the knob turned fully anticlockwise. Unplug any MIC  
connection when using the LINE input.  
Insert Point  
The unbalanced, pre-EQ insert point is a break in the channel signal path,  
allowing limiters, compressors, special EQ or other signal processing units  
to be added in the signal path. The Insert is a 3-pole A’ gauge jack socket  
which is normally bypassed. When a jack is inserted, the signal path is  
broken, just before the EQ section.  
The signal from the channel appears on the TIP of the plug and is returned  
on the RING, with the sleeve as a common ground.  
The Send may be tapped off as an alternative pre-fade, pre-EQ direct out-  
put if required, using a lead with tip and ring shorted together so that the  
signal path is not interrupted.  
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Stereo Inputs STEREO 1/2 and Stereo  
These accept 3-pole A’ gauge jacks, or 2-pole mono jacks which will  
automatically ground the ‘cold’ input. Use these inputs for sources such  
as keyboards, drum machines, synths, tape machines or as returns from  
processing units. The input is BALANCED for low noise and immunity from  
interference, but you can use UNBALANCED sources by wiring up the jacks  
as shown, although you should then keep cable lengths as short as  
possible to minimise interference pick-up on the cable. Note that the ring  
must be grounded if the source is unbalanced.  
Mono sources can be fed to both paths by plugging into the Left jack only.  
Mix Inserts  
The unbalanced,pre-fade Mix insert point is a break in the output signal path to  
allow the connection of,for example,a compressor/limiter or graphic equaliser.  
The Insert is a 3-pole A’ gauge jack socket which is normally bypassed. When  
a jack is inserted, the signal path is broken, just before the mix fader.  
The mix signal appears on the TIP of the plug and is returned on the RING.  
A ‘Y’ lead may be required to connect to equipment with separate send and  
return jacks as shown below:  
Mix Outputs  
The MIX outputs are on XLR’s, wired as shown, and incorporate  
impedance balancing, allowing long cable runs to balanced amplifiers and  
other equipment.  
Aux & FX Bus Outputs  
The Aux & FX Bus outputs are on 3-pole A’ gauge jack sockets, wired as  
shown on the left, and are impedance-balanced, allowing long cable runs to  
balanced amplifiers and other equipment. Note EPM has 2 x AUX, EFX has  
1 x AUX, 1 x FX.  
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Headphones  
The PHONES output is a 3-poleAgauge jack,wired as a stereo output as shown, ideally  
for headphones of 150or greater. 8headphones are not recommended.  
Polarity (Phase)  
You will probably be familiar with the concept of polarity in electrical signals and this is  
of particular importance to balanced audio signals. Just as a balanced signal is highly  
effective at cancelling out unwanted interference, so two microphones picking up the  
same signal can cancel out, or cause serious degradation of the signal if one of the  
cables has the +ve and -ve wires reversed. This phase reversal can be a real problem  
when microphones are close together and you should therefore always take care to  
connect pins correctly when wiring audio cables.  
Grounding and Shielding  
For optimum performance use balanced connections where possible and ensure that  
all signals are referenced to a solid, noise-free earthing point and that all signal cables  
have their screens connected to ground. In some unusual circumstances, to avoid earth  
or ground ‘loops’ ensure that all cable screens and other signal earths are connected to  
ground only at their source and not at both ends.  
If the use of unbalanced connections is unavoidable, you can minimise noise by follow-  
ing these wiring guidelines:  
On INPUTS, unbalance at the source and use a twin screened cable as though  
it were balanced.  
On OUTPUTS, connect the signal to the +ve output pin, and the ground of the  
output device to -ve. If a twin screened cable is used, connect the screen only  
at the mixer end.  
Avoid running audio cables or placing audio equipment close to thyristor  
dimmer units or power cables.  
Noise immunity is improved significantly by the use of low impedance sources,  
such as good quality professional microphones or the outputs from most  
modern audio equipment. Avoid cheaper high impedance microphones, which  
may suffer from interference over long cable runs, even with well-made cables.  
Grounding and shielding is still seen as a black art, and the suggestions above are only  
guidelines. If your system still hums, an earth/ground loop is the most likely cause. Two  
examples of how an earth loop can occur are shown below.  
Warning!  
Under NO circumstances must the AC power mains earth be disconnected from the  
mains lead.  
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PROBLEM SOLVING  
Basic problem solving is within the scope of any user if a few basic rules are fol-  
lowed.  
Get to know the Block Diagram of your console (see page 16/17).  
Get to know what all controls and/or connections in the system are supposed  
to do.  
Learn where to look for common trouble spots.  
The Block Diagram is a representative sketch of all the components of the console,  
showing how they connect together and how the signal flows through the system. Once  
you have become familiar with the various component blocks you will find the Block  
Diagram is quite easy to follow and you will have gained a valuable understanding of  
the internal structure of the console.  
Each component has a specific function and only by getting to know what each part is  
supposed to do will you be able to tell if there is a genuine fault! Many “faults” are the  
result of incorrect connection or control settings which may have been overlooked.  
BasicTroubleshooting is a process of applying logical thought to the signal path through  
the console and tracking down the problem by elimination.  
Swap input connections to check that the source is really present. Check both  
Mic and Line inputs.  
Eliminate sections of the channel by using the insert point to re-route the signal  
to other inputs that are known to be working.  
Route channels to different outputs or to auxiliary sends to identify problems  
on the Master section.  
Compare a suspect channel with an adjacent channel which has been set up  
identically. Use PFL to monitor the signal in each section.  
Insert-point contact problems may be checked by using an insert bypass jack  
with tip and ring shorted together as shown below. If the signal appears when the  
jack is inserted it shows that there is a  
problem with the normalling contacts  
on the jack socket, caused by wear  
or damage, or often just dirt or dust.  
Keep a few in your gig tool box.  
If in doubt please contact Soundcraft customer support.  
PRODUCTS UNDER WARRANTY  
UK customers should contact their local dealer. Customers outside the UK are  
requested to contact their territorial distributor who is able to offer support in the  
local time zone and language. Please see the distributor listings on our website  
OUT-OF-WARRANTY PRODUCTS  
For out-of-warranty consoles purchased in the United Kingdom, please contact the  
Customer Services Department (e-mail: [email protected]) at the fac-  
tory in Potters Bar, Hertfordshire: Telephone +44 (0)1707 665000. For all other  
out-of-warranty consoles, please contact the appropriate territorial distributor.  
When mailing or faxing please remember to give as much information as possible.  
This should include your name, address and a daytime telephone number. Should  
you experience any difficulty please contact Customer Services Department (e-mail:  
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BLOCK DIAGRAM - Soundcraft EFX  
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BLOCK DIAGRAM - Soundcraft EPM  
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MONO INPUT CHANNEL - EFX shown  
1 Mic Input  
The MIC input accepts XLR-type connectors and is designed to suit a wide range of  
BALANCED or UNBALANCED signals. Professional dynamic, condenser or ribbon  
mics are best because these will be LOW IMPEDANCE. You can use low-cost HIGH  
IMPEDANCE mics, but the level of background noise will be higher. If you turn the  
PHANTOM POWER on (top right-hand side of the mixer) the socket provides a suit-  
able powering voltage for professional condenser mics.  
ONLY connect condenser microphones with the +48V powering OFF,  
and ONLY turn the +48V powering on or off with all output faders  
DOWN, to prevent damage to the mixer or external devices.  
TAKE CARE when using unbalanced sources,which may be damaged by the phantom  
power voltage on pins 2 & 3 of the XLR connector.  
Unplug any mics if you want to use the LINE Input. The input level is set using the  
GAIN knob.  
2 Line Input  
Accepts 3-pole A’ gauge (TRS) jacks. Use this input for sources other than mics,  
such as keyboards,drum machines,synths,tape machines or DI’d guitars. The input  
is BALANCED for low noise and top quality from professional equipment, but you  
can use UNBALANCED sources by wiring up the jacks as shown below,although you  
should then keep cable lengths as short as possible. Unplug anything in the MIC  
input if you want to use this socket. Set the input level using the GAIN knob.  
3 Insert Point  
The unbalanced, pre-EQ insert point is a break in the channel signal path, allowing  
limiters,compressors,special EQ or other signal processing units to be added in the  
signal path. The Insert is a 3-poleAgauge jack socket which is normally bypassed.  
When a jack is inserted, the signal path is broken, just before the EQ section.  
The Send may also be tapped off as an alternative pre-fade, pre-EQ direct output  
if required, using a lead with tip and ring shorted together so that the signal path  
is not interrupted (see below).  
4 Gain  
This knob sets how much of the source signal is sent to the rest of the mixer. Too  
high, and the signal will distort as it overloads the channel. Too low, and the level  
of any background hiss will be more noticeable and you may not be able to get  
enough signal level to the output of the mixer.  
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Note that some sound equipment,particularly that intended for domestic  
use, operates at a lower level (-10dBV) than professional equipment and  
will therefore need a higher gain setting to give the same output level.  
See “Initial Setup” on page 31 to learn how to set GAIN correctly.  
5 Equaliser  
The Equaliser (EQ) allows fine manipulation of the sound, particularly  
to improve the sound in live PA applications where the original signal  
is often far from ideal and where slight boosting or cutting of particular  
voice frequencies can really make a difference to clarity. There are three  
sections giving the sort of control usually only found on much larger  
mixers. The EQ knobs can have a dramatic effect, so use them sparingly  
and listen carefully as you change any settings so that you get to know  
how they affect the sound.  
HF EQ  
Turn to the right to boost high (treble) frequencies above 12kHz by up to  
15dB, adding crispness to cymbals, vocals and electronic instruments.  
Turn to the left to cut by up to 15dB, reducing hiss or excessive sibilance  
which can occur with certain types of microphone. Set the knob in the  
centre-detented position when not required.  
MID EQ  
There are two knobs which work together to form a SWEPT MID EQ. The  
lower knob provides 15dB of boost and cut, just like the HF EQ knob, but  
the frequency at which this occurs can be set by the upper knob over a  
range of 150Hz to 3.5kHz. This allows some truly creative improvement  
of the signal in live situations, because this mid band covers the range  
of most vocals. Listen carefully as you use these controls together to  
find how particular characteristics of a vocal signal can be enhanced or  
reduced. Set the lower knob to the centre-detented position when not  
required.  
LF EQ  
Turn to the right to boost low (bass) frequencies below 80Hz by up to  
15dB, adding warmth to vocals or extra punch to synths, guitars and  
drums. Turn to the left to cut low frequencies by up to 15dB for reducing  
hum, stage rumble or to improve a mushy sound. Set the knob to the  
centre-detented position when not required.  
6 Aux 1 Send  
This is used to set up a separate mix for FOLDBACK or recording, and the  
combination of eachAux Send is mixed to theAux1 Output. For recording  
it is useful for the signal to fade up and down with the fader (this is called  
POST-FADE),but for Foldback or Monitor feeds it is important for the send  
to be independent of the fader (this is called PRE-FADE).  
AUX 1 SEND is globally switchable between pre and post-fade (see master  
section on page 24/25).  
7 FX Send (EFX only)  
This control sets the level of the post-fade signal being sent to the FX  
bus; from there it is routed to the FX processor.  
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7 Aux 2 Send (EPM only)  
This is used to set up a separate mix for FOLDBACK or recording, and the  
combination of each Aux Send is mixed to the Aux 2 Output. For record-  
ing it is useful for the signal to fade up and down with the fader (this is  
called POST-FADE), but for Foldback or Monitor feeds it is important for  
the send to be independent of the fader (this is called PRE-FADE).  
AUX 2 SEND is globally switchable between pre and post-fade (see master  
section on page 24/25).  
8 PAN  
This control sets the amount of the channel signal feeding the Left and  
Right MIX buses, allowing you to move the source smoothly across the  
stereo image. When the control is turned fully left or right you are able  
to route the signal at unity gain to either left or right outputs individually.  
9 MUTE  
All outputs from the channel except inserts are on when the MUTE switch  
is released and muted when the switch is down, allowing levels to be  
pre-set before the signal is required.  
10 INPUT CHANNEL FADER  
The 60mm FADER, with a custom-designed law to give even smoother  
control of the overall signal level in the channel strip, allows precise bal-  
ancing of the various source signals being mixed to the Master Section.  
You get most control when the input GAIN is set up correctly, giving full  
travel on the fader. See the “Initial Setup” section on page 36 for help  
in setting a suitable signal level.  
11 PFL  
When the latching PFL switch is pressed, the pre-fade pre-mute signal is  
fed to the headphones,control room output and meters,where it replaces  
the MIX. The PFL ACTIVE LED on the Master section illuminates to warn  
that a PFL is active. This is a useful way of listening to any required input  
signal without interrupting the main mix, for making adjustments or trac-  
ing problems.When PFL is pressed anywhere on the console, the Control  
Room outputs automatically switch from monitoring the Mix Outputs.  
12 PEAK LED  
This LED will light when the signal level approaches clipping at any of the  
three monitored points:  
a) PRE-EQ  
b) POST-EQ  
c) POST-FADE  
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STEREO INPUT CHANNELS (EFX shown)  
1 INPUTS STEREO 1/2  
These inputs accept 3-pole A’ gauge (TRS) jacks. Use these inputs for  
sources such as keyboards, drum machines, synths, tape machines or  
processing units. The inputs are BALANCED for low noise and top quality  
from professional equipment, but you can use UNBALANCED sources by  
wiring up the jacks as shown in the “Wiring it Up” section earlier in this  
manual,although you should then keep cable lengths as short as possible.  
Mono sources may be used by plugging into the left jack only.  
2 GAIN  
The GAIN control sets the level of the channel signal.  
3 EQUALISER  
HF EQ  
Turn to the right to boost high (treble) frequencies, adding crispness to  
percussion from drum machines, synths and electronic instruments. Turn  
to the left to cut these frequencies, reducing hiss or excessive brilliance.  
Set the knob in the centre-detented position when not required. The  
control has a shelving response giving 15dB of boost or cut at 12kHz.  
MF EQ  
Turn to the right to boost mid frequencies, turn to the left to cut these  
frequencies. The centre frquency of the MID EQ is 720Hz  
LF EQ  
Turn to the right to boost low (bass) frequencies, adding extra punch to  
synths, guitars and drums. Turn to the left to reduce hum, boominess or  
improve a mushy sound. Set the knob to the centre-detented position  
when not required. The control has a shelving response giving 15dB of  
boost or cut at 80Hz.  
4 AUX 1 SEND  
This is used to set up a separate mix for FOLDBACK or recording, and the  
combination of eachAux Send is mixed to theAux1 Output. For recording  
it is useful for the signal to fade up and down with the fader (this is called  
POST-FADE),but for Foldback or Monitor feeds it is important for the send  
to be independent of the fader (this is called PRE-FADE).  
AUX 1 SEND is globally switchable between pre and post-fade (see  
master section on page 24/25). The send pot is fed with a mono sum  
of the L & R signals.  
5 FX SEND (EFX only)  
This control sets the level of the post-fade signal being sent to the FX  
bus; from there it is routed to the FX processor.  
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5 AUX 2 SEND (EPM only)  
This is used to set up a separate mix for FOLDBACK or recording, and the  
combination of each Aux Send is mixed to the Aux 2 Output. For record-  
ing it is useful for the signal to fade up and down with the fader (this is  
called POST-FADE), but for Foldback or Monitor feeds it is important for  
the send to be independent of the fader (this is called PRE-FADE).  
AUX 2 SEND is globally switchable between pre and post-fade (see  
master section on page 24/25). The send pot is fed with a mono sum  
of the L & R signals.  
6 BALANCE  
This control sets the amount of the channel signal feeding the Left and  
Right MIX buses, allowing you to balance the source in the stereo image.  
When the control is turned fully right or left you feed only that side of  
the signal to the mix. Unity gain is provided by the control in the centre-  
detented position.  
7 MUTE  
All outputs from the channel are enabled when the MUTE switch is released  
and muted when the switch is down.  
8 FADER  
The 60mm FADER gives you smooth control of the overall signal level in  
the channel strip,allowing precise balancing of the various source signals  
being mixed to the Master Section. It is important that the input level is  
set correctly to give maximum travel on the fader which should normally  
be used at around the “0” mark. See the “Initial Setup” section on page  
36 for help in setting the right level.  
9 PFL  
When the latching PFL switch is pressed, the pre-fade pre-mute signal  
is fed in mono to the headphones, control room output and meters,  
where it replaces the MIX. The PFL ACTIVE LED on the Master section il-  
luminates to warn that a PFL is active. The Left and Right meters display  
the PFL signal in mono. This is a useful way of listening to any required  
input signal without interrupting the main mix, for making adjustments  
or tracing problems.  
10 CHANNEL PEAK LED  
This LED will light when the signal level approaches clipping at any of the  
three monitored points:  
a) PRE-EQ  
b) POST-EQ  
c) POST-FADE  
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MASTER SECTION (EFX)  
1 PHANTOM POWER  
Many professional condenser mics need  
PHANTOM POWER, which is a method  
of sending a powering voltage down  
the same wires as the mic signal. Press  
the switch to enable the +48V power to  
all of the MIC inputs. The adjacent LED  
illuminates when the power is active.  
WARNING: TAKE CARE when  
using unbalanced mics  
which may be damaged by  
the phantom power volt-  
age. Balanced dynamic mics  
can normally be used with  
phantom power switched on (contact  
your microphone manufacturer for guidance).  
Mics should always be plugged in, and all output faders set to minimum  
before switching the Phantom Power ON to avoid damage to external  
equipment  
2 POWER INDICATOR  
This LED lights to show when power is connected to the console.  
3 MASTER FADERS  
The MASTER FADERS set the final level of the MIX outputs, and separate  
faders are provided for each output. These should normally be set close  
to the ‘0’ mark if the input GAIN settings have been correctly set, to give  
maximum travel on the faders for smoothest control.  
4 MIX OUTPUTS, INSERTS & MONO OUTPUT  
The Mix LEFT and RIGHT outputs are sent from the XLR sockets as imped-  
ance-balanced signals. The Mix INSERT points are on 3-pole A’ gauge  
jacks and are unbalanced. The MONO OUTPUT (EFX only) caries a mono  
sum of the left and right mix signals on a 3-pole A’ gauge jack, the output  
is impedance-balanced.  
5 BARGRAPH METERS  
The three-colour peak reading BARGRAPH METERS normally show the level  
of the MIX RIGHT and MIX LEFT outputs,giving you a constant warning of ex-  
cessive peaks in the signal which might cause overloading. Aim to keep the  
signal within the amber segments at peak levels for best performance.  
Similarly, if the output level is too low and hardly registering at all on the  
meters, the level of background noise may become significant. Take care  
to set up the input levels for best performance.  
When any PFL switch is pressed, the meters switch to show the selected  
PFL signal on both meters, in mono; the PFL ACTIVE LED also lights.  
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6 RECORD OUTPUTS  
These two RCA outputs carry a copy of the MIX L  
and MIX R signals. They  
allow the use of a recording device, e.g. DAT player,  
Minidisc recorder etc.  
7 2 TRACK IN  
These two RCA phono sockets are unbalanced Left  
and Right line-level inputs, used for connecting a  
playback device.  
8 2 TRACK TO MIX  
Press this switch to route the 2 Track in signals,  
connected to the Left and Right RCA sockets 7, to  
the MIX .  
9 MONITOR 2 TRACK  
Press this switch to route the 2Track signal to the monitor and phones,  
over-riding the default Monitor/Phones signal.  
10 MONITOR LEVEL  
This control sets the level to the MONITOR LEFT & RIGHT outputs.  
If headphones are plugged into the PHONES jack, the headphone  
level will track the Monitor Level.  
11 MONITOR OUTPUTS  
The Monitor Outputs are on 3-pole A’ gauge jacks and are balanced  
connections.  
12 PHONES LEVEL  
This control sets the output level to the Headphone outputs. If  
headphones are plugged into the PHONES jack, then the knob sets  
a comfortable headphone listening level without affecting the Moni-  
tor output levels.  
13 HEADPHONES JACK  
The PHONES output is a 3-pole A’ gauge jack, wired as a stereo  
output as shown, ideally for headphones of 150or greater. 8Ω  
headphones are not recommended.  
14 AUX 1 OUTPUT (AND AUX 2 ON EPM)  
This output is on a 3-poleAgauge jack and is an impedance-balanced  
output.  
15 AUX 1 PRE/POST SWITCH (AND AUX 2 ON EPM)  
This switch globally switches the AUX 1 sends, on all of the input  
modules, to be either pre-fade or post-fade.  
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16 FX BUS OUTPUT (EFX only) (Aux 2 on EPM)  
This impedance-balanced output carries the signal from the FX bus. It could be used as a second Aux Output  
if desired, if the FX Processor is not needed at the time. The FX sends on the inputs channels to the FX bus  
are always post-fade.  
17 FOOTSWITCH (EFX only)  
Footswitch Input (see diagram on page 20) - Using a single-pole, momentary footswitch inserted into the  
FOOTSWITCH input the effects processor can be muted/un-muted.  
18 STEREO RETURN INPUTS (EFX only)  
This pair of inputs accept 3-pole A’ gauge (TRS) jacks. Use these inputs for sources such as keyboards,  
drum machines, synths or CDs. The inputs are BALANCED. Mono sources may be used by plugging into the  
left jack only.  
19 STEREO RETURN LEVEL (EFX only)  
This control sets the level of signal routed to the main mix busses.There is an associated PK LED to warn of  
signals which are too high.  
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Lexicon® FX PROCESSOR OVERVIEW (EFX only)  
The effects within the console have been designed with both live sound reinforcement and home recording in  
mind. Featuring the deep, rich reverb algorithms that Lexicon® are renowned for the effects processor offers  
increased versatility and high quality effects, all instantly accessible via the extremely intuitive front panel  
controls. The effects processor has 32 programs which are held in two banks of 16 programs which can be  
stored to allow you to create your own custom effect settings.  
Front panel controls include a Program Select knob, Tempo and Store buttons, and three independent  
Parameter knobs that provide instant access and control over the most critical parameters for the selected  
effect. The table on page 35 lists the functions of the parameter knobs for each fx program.  
Note: When the console is powered up the program recalled will always be the selected program in BANK  
A.  
FX OPERATION  
Select and Load a Program  
Turn the Program Select knob to choose a program. Note that the console has 32 programs which are held  
in two banks of 16 programs. There are individual BANK A and BANK B LED’s to indicate which bank is cur-  
rently active. When turning the rotary Program Select knob through 360 degrees (a full rotation) the selected  
bank will alternate between BANK A and BANK B.  
Set Audio Levels  
1. Set the gain on the input channel appropriate to the source (vocal microphone, guitar, keyboard, etc.).  
2. Set the FX send on the input channel to the 12 o’clock position.  
3. Set the EFFECTS Fader on the FX section to the fully down position.  
4. Provide source signal (by speaking or singing into the microphone, playing guitar, keyboard, etc.) on the  
selected channel.  
5. Turn up the FX Send level on the channel until the Red CLIP LED in the FX Panel lights only occasionally.  
If the red Input LED stays lit, too much signal is being sent to the effect processor: reduce FX Send on the  
input channel.  
6. Raise the EFFECTS Fader towards the 0dB position to feed the required level of FX Processor output signal  
to the mix.  
7. To increase or decrease the amount of effect on the signal, adjust the FX Send level on the channel that  
you want affected.  
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FX PROCESSOR CONTROLS (EFX only)  
1. Tempo Button - Tapping this button twice sets the Delay Time of the selected  
program. The LED flashes to indicate current tempo. Can be tapped in time with  
music source to synchronise the delay.  
2. Store Button - Stores program modifications to one of the program locations.  
Press and hold for three seconds will store the preset in the current location. The LED  
will flash rapidly during the store operation and then stay illuminated for 1 second  
to show the operation is complete.  
3. Pre Delay / Time/ Speed Knob - Controls Pre Delay of the reverbs or the first  
parameter (time or speed related) of the selected effect. The LED illuminates when  
the parameter matches the stored setting.  
4. Decay / Feedback/Depth Knob - Controls Decay of the reverbs or the second  
parameter (feedback or depth related) of the selected effect. The LED illuminates  
when the parameter matches the stored setting.  
5.Variation - Controls Liveliness or Diffusion (depending on the reverb selected) or  
the third parameter of the selected effect. The LED illuminates when the parameter  
matches the stored setting.  
6. Program Select Knob - Navigates through programs, turning to the required pro-  
gram will initiate the loading of the program which take approximately 1 second.The  
knob can be rotated clockwise or anticlockwise and will alternate between BANK A  
and BANK B every full rotation. The current bank is shown by its illuminated LED,  
which flashes if the FX processor is muted. There is a handy aide memoir of the  
programs printed on the front panel.  
7. Clip LED – This LED illuminates when either the incoming audio or the processed  
audio (within the effect processor) overloads, and causes distortion of the signal.  
8.PFL -This switch routes a post effects processor,pre-fade (EFFECTS FADER) signal  
to the monitor system.  
9. MUTE - This switch mutes the output of the FX processor. It doesn’t mute the PFL  
signal or the FX TO AUX 1 pre-fade signal.  
10. FX TO AUX 1 - This pot routes a pre-fade and a post-fade signal to the Aux 1-pre  
and Aux 1-post busses respectively.  
11. EFFECTS FADER - This fader controls the level of the signal, from the FX proces-  
sor, routed to the main mix busses.  
FX BUS OUT (see diagram on page 24) - This output carries the signal from the FX bus. It could be used as  
a second Aux Output if desired, if the FX Processor is not needed at the time.  
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REVERBS  
Reverberation (or “reverb” for short) is the complex effect created by the way we perceive sound in an en-  
closed space.When sound waves encounter an object or boundary, they don’t just stop. Some of the sound  
is absorbed by the object, but most of the sound is reflected or is diffused. In an enclosed space, reverb is  
dependent on many features of that space, including the size, shape and the type of materials that line the  
walls. Even with closed eyes, a listener can easily tell the difference between a closet, a locker room and  
a large auditorium. Reverb is a natural component of the acoustic experience, and most people feel that  
something is missing without it.  
Hall Reverb  
A Hall is designed to emulate the acoustics of a concert hall – a space large enough to contain an orchestra  
and an audience. Because of the size and characteristics, Halls are the most natural-sounding reverbs, de-  
signed to remainbehindthe direct sound – adding ambience and space,but leaving the source unchanged.  
This effect has a relatively low initial echo density which builds up gradually over time. Vocal Hall and Drum  
Hall reverbs are specifically tailored for those uses.Vocal Hall has as lower overall diffusion which works well  
with program material that has softer initial transients like a voice. Drum Hall has a higher diffusion setting  
which is necessary to smooth out faster transient signals found in drums and percussion instruments. In ad-  
dition to general instrumental and vocal applications, the Hall program is a good choice for giving separately  
recorded tracks the sense of belonging to the same performance.  
Plate Reverb  
A Plate reverb is a large,thin sheet of metal suspended upright under tension on springs.Transducers attached  
to the plate transmit a signal that makes the plate vibrate, causing sounds to appear to be occurring in a  
large, open space. The Plates in the FX processor model the sound of metal plates with high initial diffusion  
and a relatively bright, colored sound. Plate reverbs are designed to be heard as part of the music, mellow-  
ing and thickening the initial sound. Plate reverbs are often used to enhance popular music, particularly  
percussion.  
Room Reverb  
Room produces an excellent simulation of a very small room which is useful for dialog and voiceover appli-  
cations. Room is also practical when used judiciously for fattening up high-energy signals like electric guitar  
amp recordings. Historically, recording studio chambers were oddly-shaped rooms with a loudspeaker and  
set of microphones to collect ambience in various parts of the room.  
Chamber Reverb  
Chamber programs produce even, relatively dimensionless reverberation with little color change as sound  
decays. The initial diffusion is similar to the Hall programs. However, the sense of size and space is much  
less obvious. This characteristic, coupled with the low color of the decay tail, makes these programs useful  
on a wide range of material - especially the spoken voice, to which Chamber programs add a noticeable  
increase in loudness with low color.  
Gated Reverb  
Gated reverb is created by feeding a reverb, such as a metal plate, through a gate device. Decay Time is set  
to instant, while Hold Time varies duration and sound.The Gated reverb provides a fairly constant sound with  
no decay until the reverb is cut off abruptly. This program works well on percussion — particularly on snare  
and toms; be sure to experiment with other sound sources as well.  
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Reverse Reverb  
Reverse reverb works in the opposite fashion from normal reverb. Whereas a normal reverb has the loudest  
series of reflections heard first that then become quieter over time, the Reverse reverb has the softest reflec-  
tions (essentially the tail of the reverb) heard first, and then grows louder over time until they abruptly cut off.  
Ambience Reverb  
Ambience is used to simulate the effect of a small or medium sized room without noticeable decay. It is often  
used for voice, guitar or percussion.  
Studio Reverb  
Much like Room reverb, Studio produces an excellent simulation of smaller, well controlled acoustic spaces,  
characteristic of the main performance areas in recording studios. Studio is also useful with dialog and  
voiceover applications as well as individual instrument and electric guitar tracks.  
Arena Reverb  
Arena reverb emulates a huge physical space such as an indoor sports venue or stadium.The characteristics  
of Arena reverb are long secondary reflection times and a reduced amount of high frequency content.Arena  
is a mostly mid- and low frequency dominant reverb, and is an ideal selection for “special effect” type ap-  
plications that require extremely long reverb times. It is not a good choice for a very busy mix, since it can  
reduce intelligibility.  
Spring Reverb  
A Spring reverb is created by a pair of piezoelectric crystals—one acting as a speaker and the other acting as  
a microphone— connected by a simple set of springs. The characteristic ‘boing’ of a spring is an important  
component of many classic rock and rockabilly guitar sounds.  
KARAOKE  
The Golden Karaoke Patch creates a great Karaoke performance sound in any size KTV room.  
REVERB CONTROLS  
Pre Delay  
Creates an additional time delay between the source signal and the onset of reverberation.This control is not  
intended to precisely mimic the time delays in natural spaces, as the build-up of reverberation is gradual,  
and the initial time gap is usually relatively short. For the most natural effect, the Pre Delay values should be  
set in the range of 10-25 milliseconds. However, if a mix is very busy or overly cluttered, increasing the Pre  
Delay time may help clarify it, and set each instrument apart from each other.  
Decay  
Controls the amount of time the reverb can be heard. Higher settings increase reverberation times which are  
usually associated with larger acoustical environments, but can decrease intelligibility. Lower settings shorten  
reverb times and should be used when a smaller apparent space or a more subtle effect is desired.  
Liveliness  
Adjusts the amount of high frequency content in the reverberation tails. Higher settings increase high fre-  
quency response, creating brighter reverbs; lower settings create darker reverbs with more bass frequency  
emphasis.  
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Diffusion  
Controls the initial echo density. High settings of Diffusion result in high initial echo density, and low settings  
cause low initial density. In a real-world situation, irregular walls cause high diffusion, while large flat walls  
cause low diffusion. For drums and percussion, try using higher Diffusion settings.  
Shape  
This control helps give a sense of both room shape and room size. Low values for Shape keep the majority  
of sound energy in the early part of the reverb tail. High values move the energy to later in the reverb, and  
are helpful in creating the sense of a strong rear wall or “backslap.  
Boing  
This is a unique parameter to the Spring reverb, designed to increase or decrease the amount of spring rattle  
that is a physical characteristic of spring tank reverbs.  
DELAYS  
Delays repeat a sound a short time after it first occurs. Delay becomes echo when the output is fed back into  
the input (feedback). This turns a single repeat into a series of repeats, each a little softer than the last.  
Studio Delay  
The Studio Delay features up to 2.5 seconds of stereo delay and offers a built-in ducker that attenuates the  
delay output whenever signal is present at the input.This can be used to keep the original signal from being  
muddied up by delay repeats.  
Digital Delay  
The Digital Delay is the cleanest, most accurate of the delay programs, with up to 5 seconds of mono delay  
and the built-in ducking feature.  
Tape Delay  
In the days before digital, delays were created using a special tape recorder in which the magnetic recording  
tape was looped,with closely-spaced recording and playback heads.The delay effect was created by the tape  
moving in the space between the record and playback heads – while delay time was adjusted by changing  
the speed of the tape loop. Although very musical-sounding, wow and flutter combined with a significant  
loss of high frequencies, and to some extent also low frequencies, are all elements commonly associated  
with tape recordings. The Tape Delay offers up to 5 seconds of mono delay.  
Pong Delay  
This delay effect pans the delay repeats from left to right, while the input signal remains at its original (center)  
position. Pong Delay offers up to 5 seconds of mono delay time.  
Modulated Delay  
The Modulated Delay is enhanced by an LFO (low frequency oscillator) that produces a chorusing effect on  
the delay repeats.This is a great delay for guitar and instrument passages that need thatspecial something.”  
The Modulated Delay features up to 2.5 seconds of stereo modulated delay.  
Reverse Delay  
This delay effect emulates the old studio trick of flipping a tape over, playing it backwards through a tape  
delay, and recording the effect. The delays “build up” from softer to louder – creating the sensation that the  
delays come before the signal. Up to 5 seconds of mono delay time are available.  
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DELAY CONTROLS  
Time Range  
Controls the length of the delay relative to Tap Tempo. At the 12 o’clock position, delay repeats are synchro-  
nous with the Tempo light (represented by a Quarter Note); lower values create faster repeats, higher values  
increase the time between repeats. Range 0-72. See The Effects Data Chart for exact note values.  
Feedback  
Controls the number of delay repeats by feeding the delay output signal back into the delay input.This creates  
a series of delay repeats, each slightly attenuated until they become inaudible. Higher settings create more  
repeats; lower settings reduce the number of repeats. When this knob is turned fully clockwise, it engages  
Repeat Hold – delay repeats play back in an infinite loop, but no further input signal is introduced into the  
delay effect. Repeat Hold is available only on Studio, Digital and Pong Delay.  
Ducker Threshold  
Studio and Digital delays offer a “ducking” feature, which causes the delay repeats to attenuate (or get  
softer) by -6dB when live (or input) signal is present. This allows the delay to remain as an effect, and not  
clash with the original signal. The higher this value is set, the louder an input signal must be for the ducking  
to take place.  
Smear  
This parameter controls the amount of “smear,” or signal degradation and frequency loss. Particularly evident  
in the Tape Delay, the higher the setting, the more each delay repeat loses intelligibility compared to the  
original signal.  
Tap Ratio  
Tap Ratio sets the length between the first and second tap repeats of the Pong Delay. With this control set  
at 12 o’clock, repeats are evenly alternated between left and right channels.As this knob is turned counter-  
clockwise, the first tap occurs earlier and the second tap occurs later than they did at the 12 o’clock position.  
When the knob is turned clockwise, the first tap occurs later and the second tap occurs earlier.  
Depth  
This controls the intensity of modulation, or “depth” in the Modulated Delay. Lower settings produce a more  
subtle effect, while higher values give a more “seasick” feeling.  
Tempo Button  
Tapping this button twice sets the delay times.The Tempo button LED flashes the tempo tapped in, and delay  
taps will be synchronized to the flashing LED. Use the Time Range knob to increase or decrease delay times  
after tapping in a tempo.  
Note: When Delay Feedback is at maximum (fully clockwise) in some programs the mode changes to hold  
the audio in a constant loop. This is indicated in the Effects Data Chart as “+H”.  
MODULATED EFFECTS  
Chorus  
Chorus creates a lush, full sound by combining two or more signals together where one is unaffected and  
the other signals vary in pitch very slightly over time. Chorus is commonly used to fatten up tracks and to  
add body to guitars without coloring the original tone. Chorus can also be used with discretion to thicken a  
vocal track.  
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Knob 1: Speed Controls the modulation rate of the Chorus effect. Lower settings are subtle, while higher  
values are much more pronounced.  
Knob 2: Depth Controls the amount of pitch shifting for each voice. Lower settings provide subtle thickening  
and warmth to a track, while higher settings give a more pronounced, multi-voice effect.  
Knob 3: Voices Controls the number of additional Chorus voices. Up to 8 voices can be added, continuously  
variable in 100 individual steps.  
Flanger  
This effect was originally created by simultaneously recording and playing back two identical programs on  
two tape recorders, then using hand pressure against the flange of the tape reels to slow down first one  
machine, then the other. The result was a series of changing phase cancellations and reinforcements, with  
characteristic swishing, tunneling, and fading sounds.  
Knob 1: Speed Controls the modulation rate of the Flanger effect.  
Knob 2: Depth Controls the intensity of the Flanger effect. Lower settings provide a slight “whooshing” sound  
while higher settings provide a much more dramatic “jet airplane” sound.  
Knob 3: Regeneration This knob controls the amount of modulated signal being fed back into the input,  
creating feedback. Higher amounts add a metallic resonance to the signal.  
Phaser  
The Phaser automatically moves frequency notches up and down the spectrum of the signal by means of a  
low frequency oscillator (LFO), creating an oscillating “comb-filter” type effect. This effect is very userful on  
keyboards (especially pad presets) and guitars.  
Knob 1: Speed Controls the modulation rate of the Phaser effect.  
Knob 2: Depth Controls the intensity of the Phaser effect.  
Knob 3: Regeneration This knob controls the amount of modulated signal being fed back into the input,  
creating feedback. Higher amounts add more resonance to the effect signal.  
Tremelo/Pan  
Tremolo and Panner create rhythmic changes in signal amplitude. Tremolo affects both channel’s amplitude  
simultaneously, while the Panner affects the amplitude of each channel in an alternating manner.  
Knob 1: Speed Controls the modulation rate of the Tremolo/Panner.  
Knob 2: Depth Controls the intensity of the volume amplitude change.  
Knob 3: Phase Controls whether the amplitude change occurs in both channels simultaneously (Tremolo)  
or alternates between channels (Panner).  
Vibrato  
Vibrato is obtained by smoothly varying the pitch of the signal just sharp and flat of the original at a deter-  
mined rate. Vibrato Stereo (Wet only) Rotary Mono (Wet only) Tremolo/Pan Stereo (Wet only)  
Knob 1: Speed Controls the modulation rate of Vibrato.  
Knob 2: Depth Controls the maximum amount of pitch shift. Lower settings result in a mere “warble,” while  
higher settings produce a more exaggerated “wow” sound.  
Knob 3: Phase This control sets left and right channel waveforms out of phase, resulting in a leftto- right  
panning motion. This effect shifts the frequency spectrum of the input signal. Altering the pitch of a sound  
produces a wide range effects - from subtle detunes to full interval shifts up or down a two octave range.  
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FACTORY RESET  
Use this function if you want to erase all program data and restore the effects processor to its factory state.To  
perform a Factory Reset press and hold the STORE button while powering up the console. Once the effects  
processor has initialized (after three seconds), then release the STORE button and the effects processor will  
be restored to its factory state.  
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EFFECTS DATA CHART (EFX only)  
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USING YOUR EFX OR EPM CONSOLE  
The final output from your sound system can only ever be as good as the weakest  
link in the chain,and especially important is the quality of the source signal be-  
cause this is the starting point of the chain. Just as you need to become familiar  
with the control functions of your mixer, so you must recognise the importance  
of correct choice of inputs, microphone placement and input channel settings.  
However, no amount of careful setting up can take account of the spontaneity  
and unpredictability of live performance. The mixer must be set up to provide  
“sparecontrol range to compensate for changing microphone position and the  
absorption effect of a large audience (different acoustic characteristics from  
soundcheck to show).  
MICROPHONE PLACEMENT  
Careful microphone placement and the choice of a suitable type of microphone  
for the job is one of the essentials of successful sound reinforcement. The dia-  
grams on the left show the different pick-up patterns for the most common types  
of microphone. Cardioid microphones are most sensitive to sound coming from  
in front,and hypercardioid microphones offer even greater directivity,with a small  
amount of pickup behind the microphone. These types are ideal for recording  
vocalists or instruments, where rejection of unwanted sounds and elimination  
of feedback is important. The aim should be to place the microphone as close  
as physically possible to the source, to cut out unwanted surrounding sounds,  
allow a lower gain setting on the mixer and avoid feedback.Also a well chosen  
and well placed microphone should not need any appreciable equalisation.  
There are no exact rules - let your ears be the judge. In the end, the position  
that gives the desired effect is the correct position!  
INITIAL SETUP  
Once you have connected up your system (see the sections on connection and  
wiring earlier in this manual for guidance) you are ready to set initial positions  
for the controls on your mixer.  
Set up individual input channel as follows:  
Connect your sources (microphone, keyboard etc.) to the required in-  
puts.  
WARNING: Phantom powered mics should be connected before the +48V  
is switched on. Ensure the PA system is OFF when switching phantom  
power on or off.  
Set Master faders at 0, input faders at 0, and set power amplifier levels  
to about 70%.  
Provide a typical performance level signal and press the PFL button on  
the first channel, monitoring the level on the bargraph meters.  
Adjust the input gain until the meter display is in the amber section, with  
occasional peaks to the first red LED at a typical maximum source level.  
This allows sufficient headroom to accommodate peaks and establishes  
the maximum level for normal operation (but see note below).  
Repeat this procedure on other channels as required. As more channels  
are added to the mix, the meters may move into the red section. Adjust  
the overall level using the Master Faders if necessary.  
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Listen carefully for the characteristic sound of “feedback”. If you  
cannot achieve satisfactory input level setting without feedback,  
check microphone and speaker placement and repeat the exercise.  
If feedback persists,it may be necessary to use a Graphic Equaliser  
to reduce the system response at particular resonant frequencies.  
Note:  
The initial settings should only be regarded as a starting point for your mix.  
It is important to remember that many factors affect the sound during a  
live performance, for instance the size of the audience!  
You are now ready to start building the mix and this should be done pro-  
gressively, listening carefully for each component in the mix and watching  
the meters for any hint of overload. If this occurs,back off the appropriate  
Channel Fader slightly until the level is out of the red segments, or adjust  
the Master Faders.  
Remember that the mixer is a mixer, not an amplifier. Increasing the  
overall level is the job of the amplifier, and if it is impossible to provide  
adequate level, it is probable that the amplifier is too small for the ap-  
plication. Choose your amplifier carefully, and do not try to compensate  
for lack of power by using the mixer to increase output level.  
Note:  
The level of any source signal in the final output is affected by many fac-  
tors,principally the Input Gain control,Channel Fader and Mix Faders.You  
should try to use only as much microphone gain as required to achieve a  
good balance between signals, with the faders set as described above.  
If the input gain is set too high, the channel fader will need to be pulled  
down too far in compensation to leave enough travel for successful mixing  
and there is a greater risk of feedback because small fader movements will  
have a very significant effect on output level. Also there will be a chance  
of distortion as the signal overloads the channel and causes clipping.  
If the gain is set too low, you will not find enough gain on the faders to  
bring the signal up to an adequate level, and backgound hiss will be  
more noticeable.  
This is illustrated below:  
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APPLICATIONS  
APPLICATION 1 - LIVE SOUND REINFORCEMENT  
APPLICATION 2 - MULTISPEAKER APPLICATIONS  
This configuration demonstrates how multiple speaker configurations can be driven by the EFX and EPM mixers.  
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APPLICATION 3 - PLACES OF WORSHIP (using EFX)  
This configuration uses the FX OUT BUS (or Aux 2 on EPM) output to drive an induction loop for the hearing  
impaired (it is assumed that the FX processor isn’t being used in this configuration). Aux 1 output is used to  
generate foldback monitoring for the speaker/singer. The main outputs are used to drive the main speaker  
system. The record and playback connections are used to pass audio to and from a DAT machine or  
Cassette Recorder.  
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APPLICATION 4 - RECORDING  
The insert points on channels 1-8 may be used to feed a multitrack recorder as shown (link the send and  
return signals). The Mix outputs are used for a preliminary stereo mix on a DAT recorder.  
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GLOSSARY  
Auxiliary send  
An output from the console comprising a mix of signals from channels derived  
independently of the main stereo mix.  
Balance  
The relative levels of the left and right channels of a stereo signal.  
Balanced  
A method of audio connection which ‘balances’ the wanted signal between two  
wires, these wires also have a screen which carries no signal. Any interference is  
picked up equally by the two wires, which results in cancellation of the unwanted  
signal. In this guide, the term can refer to various circuit architectures. Connection  
details are given in relevant sections.  
Clipping  
The onset of severe distortion in the signal path, usually caused by the peak signal  
voltage being limited by the circuit’s power supply voltage.  
DAT  
Digital Audio Tape, a cassette-based digital recording format.  
dB (decibel)  
A ratio of two voltages or signal levels, expressed by the equation dB=20Log10  
(V1/V2). Adding the suffix ‘u’ denotes the ratio is relative to 0.775V RMS.  
DI(direct injection) The practice of connecting an electric musical instrument directly to the input of the  
/DI Box  
mixing console, rather than to an amplifier and loudspeaker which is covered by a  
microphone feeding the console.  
Equaliser  
A device that allows the boosting or cutting of selected bands of frequencies in the  
signal path.  
Fader  
A linear control providing level adjustment.  
Feedback  
The `howling’ sound caused by bringing a microphone too close to a loudspeaker  
driven from its amplified signal.  
Foldback  
A feed sent back to the artistes via loudspeakers or headphones to enable them to  
monitor the sounds they are producing.  
Frequency response The variation in gain of a device with frequency.  
Gain  
The amount of amplication in level of the signal.  
Headroom  
The available signal range above the nominal level before clipping occurs.  
Impedance balancing A technique used on unbalanced outputs to minimise the effect of hum and  
interference when connecting to external balanced inputs.  
Insert  
A break point in the signal path to allow the connection of external devices, for in-  
stance signal processors or other mixers at line level signals. Nominal levels can be  
anywhere between 0dBu to +6dBu, usually coming from a low impedance source.  
Pan (pot)  
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Abbreviation of ‘panorama’: controls the levels sent to left and right outputs.  
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Peaking  
The point at which a signal rises to its maximum instantaneous level, before falling  
back down again. It can also describe an equaliser response curve affecting only  
a band of frequencies, (like on a graphic equaliser), “peaking” at the centre of that  
band.  
Peak LED  
PFL  
A visual indication of the signal peaking just before the onset of clipping, which will  
distort the signal.  
Pre-fade listen: a function that allows the operator to monitor the pre-fade signal in  
a channel independently of the main mix.  
Phase  
A term used to describe the relationship of two audio signals. In-phase signals  
reinforce each other, out-of-phase signals result in cancellation. Phase is a meas-  
urement of relative displacement between two waves of identical frequency.  
Polarity  
A term used to describe the orientation of the positive and negative poles of an  
audio connection. Normally connections are made with positive to positive, nega-  
tive to  
negative. If this is reversed, the result will be out-of-phase signals (see ‘phase’  
above).  
Post-fade  
Pre-fade  
The point in the signal path after a fader and therefore affected by the fader  
position.  
The point in the signal path before a fader, and therefore unaffected by the fader  
position.  
Rolloff  
A fall in gain at the extremes of the frequency response.  
Shelving  
An equaliser response affecting all frequencies above or below the break frequency  
i.e. a highpass or lowpass derived response.  
Spill  
Acoustic interference from other sources.  
A momentary rise in the signal level.  
Transient  
Unbalanced  
A method of audio connection which uses a single wire and the cable screen as the  
signal return. This method does not provide the noise immunity of a balanced input  
(see above).  
+48V  
The phantom power supply, available at the channel mic inputs, for condenser  
microphones and active DI boxes.  
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TYPICAL CONNECTING LEADS  
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You may freely copy these pages, and use them to record the settings  
used for particular applications/gigs.  
MARK-UP SHEETS - EFX  
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16 KARAOKE  
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MARK-UP SHEETS - EPM  
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FITTING OPTIONAL RACKMOUNT EARS  
The part numbers for the kits are:  
RW5744 RACK MOUNTING KIT - EPM6  
RW5745 RACK MOUNTING KIT - EFX8/EPM8  
RW5746 RACK MOUNTING KIT- EFX12/EPM12 (included with consoles for models shipped 2010 onwards)  
Note: a rack extender is included in the EFX8/EPM8 rack mounting kit to make the console fit into a  
19” frame, see the fitting instructions below.  
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EPM/EFX TYPICAL SPECIFICATIONS  
Frequency Response  
Mic / Line Input to any Output ...............................................................+/-1.5dB, 20Hz – 20kHz  
T.H.D.  
Mic Sensitivity -30dBu, +14dBu @ Mix output ....................................................< 0.02% @ 1kHz  
Noise  
Mic Input E.I.N. (maximum gain) ..........................……….........................-127dBu (150Ω source)  
Aux, Mix and Masters (@ 0dB, faders down)..........................................................………< -85dBu  
Crosstalk (@ 1kHz)  
Channel Mute...................................................................................................................> 96dB  
Aux Send Pots Offness......................................................................................................> 86dB  
EQ (Mono inputs)  
HF ......................................................................................................................12kHz,+/-15dB  
MF (swept)...........................................................................................150Hz – 3.5kHz, +/-15dB  
LF..........................................................................................................................80Hz,+/-15dB  
Q..............................................................................................................................................1.5  
EQ (Stereo inputs)  
HF ......................................................................................................................12kHz,+/-15dB  
MF……………………………………………………...………….............…...................……..720Hz, +/-15dB  
LF ........................................................................................................................80Hz, +/-15dB  
Power Consumption...............................................................................................Less than 35W  
Operating Conditions  
Temperature Range....................................................................................................5°C to 40°C  
Input & Output Levels  
Mic Input .................................................................................................................+15dBu max  
Line Input...................................................................................................................+30dBu max  
Stereo Input ............................................................................................................+30dBu max  
Mix Output ...............................................................................................................+20dBu max  
Headphones (@150Ω) ....................................................................................................300mW  
Input & Output Impedances  
Mic Input ..............................................................................................................................2kΩ  
Line Input ...........................................................................................................................10kΩ  
Stereo Input ....................................................................................65kΩ (stereo), 35kΩ (mono)  
Outputs .............................................................................150Ω (balanced), 75Ω (unbalanced)  
E & OE.  
Soundcraft reserves the right to change specifications without notice.  
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WARRANTY  
1
Soundcraft is a trading division of Harman International Industries Ltd .  
End User means the person who first puts the equipment into regular operation.  
Dealer means the person other than Soundcraft (if any) from whom the End User purchased the  
Equipment, provided such a person is authorised for this purpose by Soundcraft or its accredited  
Distributor.  
Equipment means the equipment supplied with this manual.  
2
If within the period of twelve months from the date of delivery of the Equipment to the End User it  
shall prove defective by reason only of faulty materials and/or workmanship to such an extent that  
the effectiveness and/or usability thereof is materially affected the Equipment or the defective com-  
ponent should be returned to the Dealer or to Soundcraft and subject to the following conditions  
the Dealer or Soundcraft will repair or replace the defective components. Any components replaced  
will become the property of Soundcraft.  
3
4
Any Equipment or component returned will be at the risk of the End User whilst in transit (both to  
and from the Dealer or Soundcraft) and postage must be prepaid.  
This warranty shall only be valid if:  
a)  
the Equipment has been properly installed in accordance with instructions contained in  
Soundcraft’s manual; and  
b)  
the End User has notified Soundcraft or the Dealer within 14 days of the defect appearing;  
and  
c)  
no persons other than authorised representatives of Soundcraft or the Dealer have effected  
any replacement of parts maintenance adjustments or repairs to the Equipment; and  
d) the End User has used the Equipment only for such purposes as Soundcraft recommends,  
with only such operating supplies as meet Soundcraft’s specifications and otherwise in all respects  
in accordance with Soundcraft’s recommendations.  
5
Defects arising as a result of the following are not covered by this Warranty: faulty or negligent han-  
dling, chemical or electro-chemical or electrical influences, accidental damage, Acts of God, neglect,  
deficiency in electrical power, air-conditioning or humidity control.  
6
The benefit of this Warranty may not be assigned by the End User.  
7
End Users who are consumers should note their rights under this Warranty are in addition to and do  
not affect any other rights to which they may be entitled against the seller of the Equipment.  
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®
SOUNDCRAFT  
SOUNDCRAFT USA  
A Division of Harman International Industries Ltd  
Cranborne House, Cranborne Road,  
Potters Bar, Herts, EN6 3JN, UK  
Tel +44 (0) 1707 665000  
Fax: +44 (0) 1707 660742  
8500 Balboa Boulevard  
Northridge  
CA 91329 USA  
Tel: +1-818-920-3212  
Fax: +1-818-920-3208  
Toll Free: 888-251-8352  
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