Behringer Musical Instrument Amplifier ACX1000 User Manual

User’s manual  
Version 1.3 June 2006  
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ULTRACOUSTIC ACX1000  
ULTRACOUSTIC  
2 x 60-Watt, 2-Channel Stereo Acoustic Instrument  
Amplifier with Multi-FX Processor  
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Powerful 2 x 60-Watt amplifier specifically designed for acoustic instruments and vocals  
Dedicated tube emulator adds warmth and presence to instruments and vocals  
2 independent channels with separate volume controls, dedicated EQs and each two feedback filters  
Instrument channel produces warm and transparent sound for pickup-equipped instruments and features  
additional Attack and FX Return controls plus 2 tunable notch filters for feedback suppression  
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Microphone/Line channel provides microphone inputs with phantom power for both dynamic and condenser  
microphones, Enhancer control, FX Return control and 2 tunable notch filters optimized for suppressing  
microphone feedback  
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Active, ultra-musical 3-band EQ per channel  
24-bit stereo multi-FX processor with high-resolution 24-bit converters  
23 algorithms for authentic effects such as Reverb, Delay, Rotary Speaker, Chorus, Flanger, Stereo  
Panning, Tremolo and various effects combinations for instrument and microphone/line channels  
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99 programs stored in 4 presets that can be recalled via footswitch  
Parallel Tuner output for tuner connection  
Adjustable stereo Aux input on phone jacks for adding line signals (e.g. CD player, drum computer, etc.),  
with Aux level control and Mute switch  
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Separate insert option for external effects devices available for both channels as well as master section  
Footswitch FS114 for effects switching included  
MIDI effects selection via program change commands  
Master volume control with switchable Phase correction  
High-quality components and exceptionally rugged construction ensure long life  
Conceived and designed by BEHRINGER Germany  
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ULTRACOUSTIC ACX1000  
FOREWORD  
TABLE OF CONTENTS  
1. INTRODUCTION ......................................................... 5  
Dear Customer,  
1.1 The design concept ........................................................ 5  
1.1.1 Tube emulator ...................................................... 5  
1.2 Before you begin ............................................................ 6  
1.3 Online registration ........................................................... 6  
welcome to the team of  
BEHRINGER users and  
thank you very much for  
expressing your confi-  
dence in us by purchasing  
the ACX1000.  
2. CONTROL ELEMENTS ............................................... 7  
Writing this foreword  
for you gives me great  
2.1 Front panel ...................................................................... 7  
2.2 Rear panel ....................................................................... 9  
pleasure, because it  
represents the culmi-  
nation of many months  
3. EFFECTSTABLE .......................................................10  
3.1 MIDI control .................................................................... 10  
of hard work delivered  
by our engineering team  
to achieve a very am-  
bitious goal: To present  
4. INSTALLATION ......................................................... 11  
4.1 Mains connection .......................................................... 11  
4.2 Audio connections ........................................................ 11  
4.3 MIDI connection ............................................................. 11  
4.4 MIDI implementation ....................................................... 12  
you with an excellent  
2-channel acoustic guitar  
amplifier which features  
authentic sound quality  
and an integrated digital multi-effects device, not to forget the  
professional design. The task of designing our new ACX1000  
certainly meant a great deal of responsibility which we assumed  
by focusing on you, the discerning user and musician. Meeting  
your expectations also meant a lot of work and night shifts. But  
it was fun, too. Developing a product usually brings a lot of  
people together, and what a great feeling it is when all who  
participated in such a project can be proud of what they’ve  
achieved.  
5. SPECIFICATIONS .....................................................13  
6. WARRANTY ..............................................................14  
FEDERALCOMMUNICATIONS COMMISSION  
COMPLIANCE INFORMATION .....................................15  
It is our philosophy to share our enjoyment with you, because  
you are the most important member of the BEHRINGER team.  
With your highly competent suggestions for new products you’ve  
made a significant contribution to shaping our company and making  
it successful. In return, we guarantee you uncompromising quality  
as well as excellent technical and audio properties at an extremely  
reasonable price. All of this will enable you to give free rein to  
your creativity without being hampered by budget constraints.  
We are often asked how we manage to produce such  
high-quality devices at such unbelievably low prices. The answer  
is quite simple: it’s you, our customers! Many satisfied customers  
mean large sales volumes enabling us to get better purchasing  
terms for components, etc. Isn’t it only fair to pass this benefit on  
to you? Because we know that your success is our success  
too!  
I would like to thank all of you who have made the  
ACX1000 possible. You have all made your own personal  
contributions, from the developers to the many other employees  
at this company, and to you, the BEHRINGER user.  
My friends, it’s been worth the effort!  
Thank you very much,  
WARNING!  
Uli Behringer  
It should be pointed out, that extreme output  
volumes may damage your ears and/or your  
headphones. Turn down all LEVEL controls before  
you switch on the unit. Always pay attention to an  
appropriate volume.  
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ULTRACOUSTIC ACX1000  
1. INTRODUCTION  
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Sophisticated analog technology with a “feel factor” only  
analog technology can provide.  
Thank you very much for expressing your confidence in  
BEHRINGER products by purchasing the ULTRACOUSTIC  
ACX1000. With the ULTRACOUSTIC, you have acquired a state-  
of-the-art 2-channel amplifier that can be operated easily and  
quickly, and enables you to create out-of-the-ordinary sounds  
for a variety of applications.  
Latest DSP technology to give you a broad range of modern  
studio-compatible effect sounds.  
Rugged and solid construction which even withstands the  
roughest handling.  
Intuitive operation, so that you can focus your mind on  
what is most important to you: your music!  
When developing the ACX1000, our top objective was to  
reproduce the pure and detail-rich sound of acoustic instruments  
and to help you work out the characteristic properties of your  
instrument. For this reason the instrument channel includes a  
number of controls tailored specifically to meet the requirements  
of acoustic instruments. What’s more, your ULTRACOUSTIC has  
a second microphone/instrument channel with about the same  
control elements plus an enhancer circuit that gives, for example,  
vocals increased presence and liveliness. A very special feature  
is the ULTRACOUSTIC’s digital multi-effects processor with its  
wealth of studio-compatible effects. The tube emulator gives  
audio signals in both channels unmistakable tube quality and  
adds that much sought-after effect of warmth and transparency.  
When working in the studio or on stage, you will find the numerous  
connection options on your ACX1000 very helpful. And despite  
its extremely flexible design, your ULTRACOUSTIC can be  
operated easily and intuitively.  
This manual first describes the terminology used,  
so that you can fully understand the ULTRACOUSTIC  
and its functions. Please read the manual carefully  
and keep it for future reference.  
1.1 The design concept  
The philosophy behind BEHRINGER products guarantees a  
no-compromise circuit design and employs the best choice of  
components. The operational amplifiers used in the  
ULTRACOUSTIC are exceptional: they boast extreme linearity  
and very low distortion characteristics. To complement this  
design, the choice of components include low-tolerance resistors  
and capacitors, high-quality potentiometers and several other  
stringently selected elements.  
BEHRINGER is an audio engineering company that has been  
successfully developing products for studio and live applications  
for many years now. Our range of products includes  
microphones and a variety of 19" devices (compressors,  
enhancers, gates, tube processors, headphone amps, digital  
effects devices, DI boxes etc.) as well as various monitoring  
and P.A. speakers plus professional live and recording consoles.  
The name of BEHRINGER stands for no-compromise quality, fully-  
featured products and exemplary service—even years after  
purchase—as well as sensationally low prices, which allow  
any ambitious music lover to make their musical dreams come  
true.  
The ULTRACOUSTIC uses SMD technology (Surface Mounted  
Device). These subminiature components adapted from  
aerospace technology allow for an extreme packing density to  
further improve the overall reliability.  
The super-robust steel enclosure of your ULTRACOUSTIC,  
with its generously proportioned high-capacity power supply  
and temperature-controlled active fan, makes sure that your  
ACX1000 keeps on working even when the going gets tough.  
The cabinet is made of high-grade, non-polluting E1-MDF boards,  
which are grooved, multi-glued and free of formaldehyde.  
We also set great store by flexibility, which has become a  
particularly important factor in the music business over the past  
few years. Modern guitarists and musicians need to offer a  
broad range of sounds, but should still be able to play in different  
kinds of applications at short notice: home recording, studio, live  
concerts. For this reason, it has always been our prime concern  
to give you a maximum of functions that can still be operated  
intuitively and quickly—no matter what kind of style you play.  
1.1.1 Tube emulator  
A special FET circuit in your ULTRACOUSTIC emulates the  
positive characteristics of a tube exciter, producing additional  
harmonics and a subtle compression effect which gives your  
guitar sounds the power to make themselves heard and adds  
sustain and definition. Acoustic guitars, in particular, with their  
wide dynamic range, need to produce a homogeneous sound  
image in all registers. The FET circuit makes sure that even the  
high registers have sufficient sustain and won’t get drowned.  
While the WARMTH control allows you to add the tube sound  
effect as desired.  
As technology advances, you’ve got to keep track of latest  
technological breakthroughs to avoid falling by the wayside. We  
too have continuously improved the ULTRACOUSTIC and included  
many of your valuable suggestions. We have spared neither  
expense nor effort to test different types of circuitry and  
speakers until the results have given us complete satisfaction.  
After all, we really want to give you fully designed and developed  
products that meet your expectations in every respect. The  
ULTRACOUSTIC shall be a useful tool for years to come, which  
is why we’ve equipped the effects modules of our entire guitar  
amplifier series with EPROMS that can be updated. In this way,  
we can keep working on new algorithms and considering your  
ideas and suggestions. The resulting software updates will be  
made available for free on the Internet, so as to ensure that your  
amp will never be outdated.  
By using solid-state components we succeeded in eliminating  
tube-specific interference noise to a great extent; the actual  
tube effect is thus achieved without additional noise or hum.  
We’ve packed our entire experience into this latest-generation  
acoustic guitar amp. Many people contributed to this project of  
intense development: studio musicians, collectors of vintage  
guitar amps, music and guitar lovers alike. All of them helped us  
develop an amplifier that gives you the best of all worlds:  
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1. INTRODUCTION  
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ULTRACOUSTIC ACX1000  
1.2 Before you begin  
1.3 Online registration  
Your BEHRINGER ULTRACOUSTIC was carefully packed in  
the factory and the packaging is designed to protect the unit  
from rough handling. Nevertheless, we recommend that you  
carefully examine the packaging and its contents for any signs  
of physical damage, which may have occurred during transit.  
Please do remember to register your new BEHRINGER  
equipment right after your purchase by visiting  
kindly read the terms and conditions of our warranty carefully.  
Should your BEHRINGER product malfunction, our goal is to  
have it repaired as quickly as possible. To arrange for warranty  
service, please contact the retailer from whom the equipment  
was purchased. Should your BEHRINGER dealer not be located  
in your vicinity, you may directly contact one of our subsidiaries.  
Corresponding contact information is included in the original  
equipment packaging (Global Contact Information/European  
Contact Information). Should your country not be listed, please  
contact the distributor nearest you. A list of distributors can be  
found in the support area of our website (www.behringer.com).  
Damaged units should NEVER be sent directly to us.  
Please inform the dealer from whom you acquired  
the unit immediately as well as the transportation  
company from which you took delivery of the unit.  
Otherwise, all claims for replacement/repair may  
be rendered invalid.  
Please always use the original packaging to avoid  
damage due to storage or shipping.  
Registering your purchase and equipment with us helps us  
process your repair claims quicker and more efficiently.  
Never let unsupervised children play with the A16  
or with its packaging.  
Thank you for your cooperation!  
Please dispose of all packaging materials in an  
environmentally friendly fashion.  
Be sure that there is enough space around the unit for cooling  
and please do not place the ULTRACOUSTIC on high temperature  
devices such as radiators etc. to avoid overheating.  
Before you connect your ULTRACOUSTIC to the  
mains, please make sure that your local voltage  
matches the voltage required by the unit!  
The mains connection of the ULTRACOUSTIC is made by using  
the enclosed mains cable and a standard IEC receptacle. It meets  
all of the international safety certification requirements.  
Please make sure that all units have a proper  
ground connection. For your own safety, never  
remove or disable the ground conductor of the unit  
or of the AC power cable.  
IMPORTANT NOTES CONCERNING INSTALLATION  
The sound quality may diminish within the range of  
powerful broadcasting stations and high-frequency  
sources. Increase the distance between the  
transmitter and the device and use shielded cables  
for all connections.  
The MIDI connection (IN) is made with standardized DIN plug-in  
connectors. An optocoupler has been used for isolated data  
communications.  
You will find additional information in chapter  
“INSTALLATION”.  
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6
1. INTRODUCTION  
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ULTRACOUSTIC ACX1000  
2. CONTROL ELEMENTS  
Fig. 2.1: The front panel of the ULTRACOUSTIC  
Your BEHRINGER ULTRACOUSTIC ACX1000 is equipped with 20 front panel controls, 9 push-buttons and a 2-digit, 7-segment LED  
display. Two 1/4" phone jacks and one XLR jack are available as well.  
2.1 Front panel  
Fig. 2.2: The front panel control elements  
Use the 1/4" INSTRUMENT jack on the instrument channel  
to connect an acoustic guitar to your ULTRACOUSTIC.  
Please use a commercial 1/4" jack mono cable (no DIY (Do  
It Yourself), better ask your specialized dealer), with good  
mechanical and electrical shielding, so as to avoid  
unpleasant surprises during rehearsals or concerts.  
The FEEDBACK 1 control adjusts a notch filter that allows  
you to suppress feedback frequencies or other forms of  
interference. The frequency range is from 65 Hz through  
400 Hz. To detect and suppress interference frequencies,  
please turn the FEEDBACK 1 control slowly.  
The FEEDBACK 2 control determines the frequency of a  
The PHASE switch reverses the instrument channel’s  
phase by 180°. Use this function to eliminate feedback  
problems or phase errors caused by dual pickup systems.  
second notch filter, ranging from 150 Hz through 900 Hz.  
Use the EFFECT control to determine the intensity of the  
effect selected on the effects module (instrument channel).  
The TUNER switch allows you to mute the instrument  
channel’s output. The TUNER jack on the rear of your  
ACX1000 provides a copy of the guitar signal for connection  
to an external tuner.  
The MIC jack is the balanced XLR microphone input of the  
microphone/line channel.  
The balanced LINE/INST. jack of the microphone/line  
channel can be used for line-level signals, e.g. keyboards,  
samplers etc.  
The GAIN control governs the volume level of the instrument  
channel.  
The +48 V switch activates the phantom power supply for  
the XLR microphone input, providing the operating voltage  
required for condenser microphones.  
When the input signal overdrives the instrument channel,  
the CLIP LED signals this condition. Reduce the input gain  
with the GAIN control, until the CLIP LED just stops lighting  
up. Occasional flashing of the CLIP LED, caused by signal  
peaks, is harmless though, because the instrument channel  
has sufficient headroom.  
Use the GAIN control to determine the volume level of the  
microphone/line channel.  
When the input signal overdrives the microphone/line  
channel, the CLIP LED signals this condition. Reduce the  
input gain with the GAIN control, until the CLIP LED just  
stops lighting up. Occasional flashing of the CLIP LED,  
caused by signal peaks, is harmless though, because the  
microphone/line channel, too, has sufficient headroom.  
The BASS control in the EQ section allows you to boost/cut  
the bass frequencies on the instrument channel.  
With the MID control you can boost/cut the midrange  
frequencies on the instrument channel.  
Finally, the TREBLE control governs the instrument  
channel’s high frequency gain.  
The BASS control in the EQ section allows you to boost/cut  
the bass frequencies on the microphone/line channel.  
The ATTACK control is quite useful to emphasize attack  
sounds. For example, when you pick the strings of your  
guitar with your fingers, try turning the ATTACK control to  
the right. The more you do so, the more “accented” the  
sound becomes.  
With the MID control you can boost/cut the midrange  
frequencies on the microphone/line channel.  
Finally, the TREBLE control governs the microphone/line  
channel’s high frequency gain.  
Please note that with all three EQ controls set fully  
to the left (instrument channel), the resulting signal  
will be very low-volume.  
7
2. CONTROL ELEMENTS  
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ULTRACOUSTIC ACX1000  
With the ENHANCER control you can add treble  
frequencies to the microphone/line signal, thus improving  
the audio signal’s power and transparency.  
The DISPLAY reads the program number of the currently  
active preset. Use the table printed on the effects module  
to locate the various groups of effects and associated  
program numbers. “--” means that the effects module is  
disabled.  
The FEEDBACK 1 control adjusts a notch filter that allows  
you to suppress feedback frequencies or other forms of  
interference. The frequency range is from 650 Hz through  
4 kHz. To detect and suppress interference frequencies,  
please turn the FEEDBACK 1 control slowly.  
When you press the POWER switch on the rear of the unit,  
the POWER LED lights up. Be sure to properly connect  
your ULTRACOUSTIC to the mains before (see chapter 3  
“INSTALLATION”).  
The FEEDBACK 2 control determines the frequency of a  
second notch filter, ranging from 1.5 kHz through 9.5 kHz.  
Use the EFFECT control to determine the intensity of the  
effect selected on the effects module (microphone/line  
channel).  
The WARMTH control adjusts the ULTRACOUSTIC’s tube  
emulator circuit. The more you turn this control to the right,  
the more upper harmonics are added to the signals on the  
instrument or microphone/line channels, which results in a  
sound of unobtrusive brilliance with improved power and  
transparency.  
Use this CONTROL INDICATOR to assess the amount of  
upper harmonics added with the WARMTH control.  
To achieve the maximum tube emulation effect, both  
channels should be set to correct levels. The CLIP  
LED should be flashing with signal peaks only. Make  
sure it never lights up all the time.  
The PHASE switch reverses the phase of the mix signal  
by 180°. Use this switch to eliminate feedback problems.  
The MASTER control determines the overall volume level  
of your ULTRACOUSTIC.  
The ULTRACOUSTIC features a limiter circuit in the master  
section. The LIM LED lights up as soon as the limiter is on.  
The AUX input on the rear of your ACX1000 can be muted  
with the MUTE switch.  
The AUX LEVEL control in the master section adjusts the  
volume level of the AUX signal (e.g. drum computer,  
playback) fed in via the AUX IN or TAPE IN jacks on the rear  
of the ULTRACOUSTIC.  
Your ACX1000 features an on-board effects module that  
produces 23 different types of effects comprising 99 effect  
variations plus associated program numbers.  
Use the four PRESET buttons to assign an effects program  
to one of the PRESET buttons and recall it from there. To  
save a preset selected with the PROGRAM control, simply  
press one of the four PRESET buttons for about 2 seconds,  
until its LED lights up. To recall a stored preset, press the  
corresponding PRESET button. The mix of signals adjusted  
with the EFFECT control will of course be stored as well.  
To adjust the MIDI receive channel, press PRESET buttons  
#3 and #4. Then, select a MIDI channel with the PROGRAM  
control (1 through 16, “on” = Omni, “OF” = inactive). Finally,  
quit the menu by pressing either one of the PRESET buttons.  
Select one of 99 effect programs with the PROGRAM  
control.  
The INSTRUMENT CLIP LED lights up as soon as the  
effects module starts distorting. Reduce the input gain on  
the instrument channel.  
The MIC CLIP LED lights up as soon as the effects module  
starts distorting. Reduce the input gain on the microphone/  
line channel.  
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2. CONTROL ELEMENTS  
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ULTRACOUSTIC ACX1000  
2.2 Rear panel  
Fig. 2.3: The rear panel connectors  
Use the POWER switch to put the ULTRACOUSTIC into  
The AUX IN allows you to feed in additional stereo signals,  
for example, to play with a drum computer or some sort of  
playback. Additionally, you can use the AUX IN in  
combination with the INSERT SEND as a parallel effect  
path: connect the INSERT SEND to the input and the AUX IN  
to the output of the effects device (INSERT RETURN jacks  
should not be used in this case!). Thus, the signal path  
inside the amplifier will not be interrupted and you can add  
the effect portion from the external device, using the AUX  
LEVEL control. Please note that the external effects device  
must be set to 100% wet for this purpose.  
operation.  
FUSE HOLDER / VOLTAGE SELECTOR. Please make  
sure that your local voltage matches the voltage indicated  
on the unit, before you attempt to connect and operate the  
ULTRACOUSTIC. Blown fuses may only be replaced by  
fuses of the same type and rating. Some models allow for  
inserting the fuse holder in two different positions, in order  
to switch over from 230 V to 120 V operation, and vice  
versa. Please note that for 120 V operation outside Europe,  
you need a fuse of a higher rating (see chapter 3  
“INSTALLATION”).  
This is the MIC INS. SEND jack of the microphone/line  
channel’s insert path. Connect this jack to the input of an  
external effects device or compressor.  
Use the enclosed power cord to connect the unit to the  
mains.  
This is the MIC INS. RETURN jack of the microphone/line  
channel’s insert path. Connect this jack to the output of an  
external effects device.  
SERIAL NUMBER.  
Connect the enclosed footswitch to the FOOTSWITCH  
jack. The footswitch allows you to recall the four effects  
presets.  
The instrument channel also features an insert path. This  
is the INSTR. INS. SEND jack.  
MIDI IN. This connector gives you MIDI remote control over  
your ULTRACOUSTIC. You can change effects programs  
by means of program change commands.  
The INSTR. INS. RETURN jack is used to feed back the  
effect signal to the ACX1000.  
The TUNER output always provides the instrument  
channel’s audio signal to feed an external tuner.  
The balanced DIRECT OUT jack provides a line-level copy  
of the instrument channel’s signal. Use this jack to connect  
an external power amp or mixing console.  
Your ULTRACOUSTIC also features a serial stereo master  
insert path, which allows you to insert external effects  
devices. These are the MASTER INSERT SEND jacks for  
the left and right channels, which should be connected to  
the inputs of the external effects device. You can also tap  
a stereo signal from these connectors.  
These are the MASTER INSERT RETURN jacks for  
connection to the outputs of an external effects device.  
Please note that when using the serial effects path,  
the external effects device should not be set to  
100% wet (100% effect signal); otherwise, there will  
be no direct signal portion fed back to the  
ULTRACOUSTIC.  
The TAPE OUT provides  
a
stereo copy of the  
ULTRACOUSTIC’s audio signal, e.g. for recording purposes.  
The TAPE OUT is on RCA jacks.  
The TAPE IN jacks perform the same function as the AUX  
IN. However, due to the RCA connectors you can also  
connect a tape deck or hi-fi system directly to the TAPE IN  
jacks.  
9
2. CONTROL ELEMENTS  
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ULTRACOUSTIC ACX1000  
3. EFFECTS TABLE  
3.1 MIDI control  
With its built-in MIDI interface you can control the  
ULTRACOUSTIC via MIDI, for example, to select effects from a  
MIDI sequencer (studio), or from a master keyboard or MIDI  
footcontroller (live).  
Preset no.  
--  
Effect  
Bypass  
Effect type  
-
01 - 03  
04 - 06  
07 - 09  
10 - 13  
14 - 15  
16 - 19  
20 - 22  
23 - 25  
26 - 28  
29 - 35  
36 - 42  
43 - 47  
48 - 58  
59 - 63  
64 - 68  
69 - 70  
71 - 73  
74 - 76  
77 - 78  
79 - 81  
82 - 87  
88 - 93  
94 - 96  
97 - 99  
Chorus + Delay + Reverb  
Chorus + Room 1  
Chorus + Room 2  
Chorus + Hall  
Flanger + Reverb  
Delay + Room 1  
Delay + Room 2  
Delay + Hall  
Parallel  
Parallel  
Parallel  
Parallel  
Parallel  
Parallel  
Parallel  
Parallel  
Parallel  
Single  
Single  
Single  
Single  
Single  
Single  
Single  
Single  
Single  
Single  
Dual  
Connect the MIDI IN jack of your ULTRACOUSTIC to the MIDI  
OUT jack of a MIDI footcontroller. Now, enable the MIDI functions  
on your ULTRACOUSTIC by pressing the PRESET buttons #3  
and #4 for about two seconds: the two control LED’s of PRESET  
buttons #3 and #4 start flashing, the right decimal point in the  
display lights up. Select a MIDI channel with the PROGRAM control  
(1 through 16, “on” = Omni, “OF” = inactive) and quit the menu by  
pressing either one of the PRESET buttons. “Omni” mode means  
that your ULTRACOUSTIC receives and processes MIDI  
information on all MIDI channels. Of course, you should select  
the same channel both on your MIDI footcontroller and ACX1000  
(see MIDI footcontroller user’s manual).  
Delay + Chorus  
Room  
Hall  
Plate  
You can select presets via MIDI using program change  
commands. When you send program change command #127,  
the effects module of your ACX1000 will be bypassed, i.e. you  
will hear no effect. As is usual with MIDI program change  
commands, program change #0 corresponds to program #1,  
and program change #1 to program #2, etc. (see table 4.1 in the  
appendix). The program change numbers 99 through 102 select  
the preset stored for the four PRESET buttons. After changeover  
the preset is activated immediately, i.e. it will not be affected by  
previously adjusted bypass settings.  
Delay  
Multitap Delay  
Chorus  
Flanger  
Rotary Speaker  
Tremolo  
Pan  
Reverb / Reverb  
Slow Chorus / Reverb  
Fast Chorus / Reverb  
Delay / Reverb  
Rotary Speaker / Reverb  
Dual  
Dual  
Dual  
Dual  
Tab. 3.1: The effect algorithms of the ULTRACOUSTIC  
A very special feature of your ULTRACOUSTIC is its built-in  
multi-effects processor that creates a variety of first-class,  
studio-compatible algorithms. This effects module provides a  
total of 99 preset, organized in 23 different groups of effects.  
Each group comprises a number of presets with varying  
parameter settings and covering a broad spectrum of effects  
and effects combinations.  
The range of effects provided consists of single, parallel and  
dual effects. The single and parallel effects provide an effect or  
effects combination for both channels. The dual effects allow  
you to give each channel its own effect.  
Use the four PRESET buttons to store one effects program  
each, including the mix ratio adjusted with the EFFECT controls  
(original vs. effect signal for both channels). To store a preset  
selected with the PROGRAM control, simply press one of the  
four PRESET buttons for about 2 seconds, until its associated  
LED lights up.  
To recall the four presets stored, press one of the PRESET  
buttons or one of the four buttons on the enclosed footswitch.  
10  
3. EFFECTS TABLE  
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ULTRACOUSTIC ACX1000  
4. INSTALLATION  
4.1 Mains connection  
Please ensure that the ULTRACOUSTIC is set to the  
correct supply voltage before connecting the unit to the  
AC power system! Three triangular markings can be found on  
the fuse holder at the AC power connection socket. Two of  
these three triangles will be aligned with one another. The  
ULTRACOUSTIC is set to the operating voltage shown next to  
these markings and can be switched over by twisting the fuse  
holder by 180°. IMPORTANT: This does not apply to export  
models designed only for 120 V~!  
The mains connection of the ULTRACOUSTIC is made by using  
the enclosed mains cable and a standard IEC receptacle. It meets  
all of the international safety certification requirements.  
Fig. 4.3: 1/4" stereo jack connector  
4.3 MIDI connection  
4.2 Audio connections  
The MIDI standard (Musical Instruments Digital Interface) was  
developed in the early 80’s to enable electronic musical  
instruments of different makes to communicate with each other.  
Over the years the range of MIDI applications has constantly  
expanded, and today it is completely normal to network entire  
recording studios using the MIDI standard.  
Except for the MIC and LINE/INST. inputs and the DIRECT OUT,  
the audio inputs and outputs of your BEHRINGER ULTRACOUSTIC  
are on unbalanced connectors. Please use commercially available  
RCA connectors for the TAPE inputs and outputs.  
Please ensure that only qualified persons install  
and operate the ULTRACOUSTIC. During installation  
and operation the user must have sufficient  
electrical contact to earth. Electrostatic charges  
might affect the operation of the ULTRACOUSTIC!  
At the heart of this network we find a computer loaded with a  
sequencer software that controls not only the keyboards but  
also effects and other peripheral devices. In such a studio you  
could control your ULTRACOUSTIC in real time from a computer.  
In particular, when playing live gigs you can use a MIDI  
footcontroller to control both the effect parameters and channel/  
effect changes on your ULTRACOUSTIC.  
The MIDI connector on the rear of your ULTRACOUSTIC is an  
internationally standardized 5-pin DIN jack. To connect your  
ULTRACOUSTIC to other MIDI equipment, you need a dedicated  
MIDI cable, which is commercially available in various lengths.  
However, you can solder your own cables using 2-conductor  
shielded cables (e.g. microphone cables) and two rugged 180°  
DIN plugs: pin 2 (center) = shield; pins 4 and 5 (right and left of  
pin 2) = internal conductor; pins 1 and 3 (the outer pins) are not  
used. MIDI cables should not exceed a length of 15 meters.  
Make sure that pin 4 is connected to pin 4, and pin 5  
to pin 5 on both plugs.  
Fig. 4.1: XLR connections  
MIDI IN: receives MIDI controller information. The receiving  
channel can be set with the buttons UP and DOWN. On = Omni,  
i.e. MIDI data are received and processed on all channels (see  
section 3.2).  
Fig. 4.2: 1/4" mono jack  
11  
4. INSTALLATION  
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ULTRACOUSTIC ACX1000  
4.4 MIDI implementation  
MIDI Implementation Chart  
Function  
Transmitted Recognized Remarks  
memorized  
Default  
Changed  
X
X
OFF, 1 - 16  
OFF, 1 - 16  
Basic  
Channel  
Default  
Messages  
Altered  
X
X
X
1, 2  
X
X
Mode  
X
X
X
X
Note  
Number  
True Voice  
Note ON  
Note OFF  
X
X
X
X
Velocity  
Keys  
Channels  
X
X
X
X
After  
Touch  
Pitch  
X
X
X
Bender  
Control  
X
X
O (0 - 98)  
127:  
Bypass  
99 - 102:  
PRESET  
BUTTON  
1 - 4  
Progr.  
Change  
X
X
System  
Exclusive  
X
Song Pos.  
Song Sel.  
Tune  
X
X
X
X
X
X
System  
Common  
System  
Real Time  
Clock  
Commands  
X
X
X
X
Local  
ON/OFF  
All notes OFF X  
Active Sense  
Reset  
X
X
X
X
X
Aux  
Messages  
X
X
Notes  
O = YES, X = NO  
Mode 1:  
Mode 2:  
OMNI ON  
OMNI OFF  
Tab. 4.1: MIDI implementation  
12  
4. INSTALLATION  
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ULTRACOUSTIC ACX1000  
5. SPECIFICATIONS  
AUDIO INPUTS  
POWER SUPPLY  
Mains voltage  
USA/Canada 120 V~, 60 Hz  
China/Korea 220 V~, 50 Hz  
U.K./Australia 230 V~, 50 Hz  
Instrument channel  
Connector  
Type  
1/4" phone jack  
unbalanced, RF filtered input  
app. 10 MΩ  
Europe  
Japan  
230 V~, 50 Hz  
100 V~, 50 - 60 Hz  
Input impedance  
Microphon/line channel  
Microphone input  
Connector  
general  
export model 120/230 V~, 50 - 60 Hz  
42 Watts min./200 Watts max.  
100 - 120 V~: T 5 A H 250 V  
200 - 240 V~: T 2.5 A H 250 V  
standard IEC receptacle  
XLR  
Power consumption  
Fuse  
Type  
balanced, RF filtered input  
app. 25 kΩ  
Input impedance  
Line input  
Mains connection  
Connector  
1/4" TRS jack  
Type  
Input impedance  
balanced, RF filtered input  
app. 40 kbalanced  
20 kunbalanced  
PHYSICAL  
Dimensions  
(H x W x D)  
app. 17" (431.8 mm)  
x 23 2/3" (600.65 mm)  
x 10 3/5" (270 mm) / 12 3/10" (312.6 mm)  
app. 48.51 Ibs (22 kg)  
Aux/tape input  
Connector  
1/4" phone jack/RCA  
unbalanced, RF filtered input  
app. 10 kΩ  
Type  
Input impedance  
Weight  
AUDIO OUTPUTS  
BEHRINGER is constantly striving to maintain the highest professional  
standards. As a result of these efforts, modifications may be made from  
time to time to existing products without prior notice. Specifications and  
appearance may differ from those listed or illustrated.  
Direct out output  
Connector  
Type  
XLR  
balanced, low-impedance  
line-level output  
app. 200 balanced  
100 unbalanced  
+24 dBu balanced  
Output impedance  
Max. output level  
Tape output  
Connector  
RCA  
Type  
unbalanced, low-impedance  
line-level output  
app. 100 Ω  
Output impedance  
Max. output level  
+20 dBu unbalanced  
POWER AMPLIFIER  
Power amp output  
2 x 60 Watts  
MIDI INTERFACE  
Type  
5-pin-DIN-socket, MIDI IN  
DIGITAL PROCESSING  
Converters  
24-bit sigma-delta, 64/128-times  
oversampling  
Sampling rate  
46.875 kHz  
DISPLAY  
Type  
2-digit numeric LED display  
LOUDSPEAKER  
Type  
2 x 8" loudspeaker, special  
custom-made acoustic speaker  
8 (8" loudspeaker)  
Impedance  
Power handling  
max. 60 Watts (8" loudspeaker)  
13  
5. SPECIFICATIONS  
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ULTRACOUSTIC ACX1000  
6. WARRANTY  
2. If the product needs to be modified or adapted in order to  
comply with applicable technical or safety standards on a national  
or local level, in any country which is not the country for which  
the product was originally developed and manufactured, this  
modification/adaptation shall not be considered a defect in  
materials or workmanship. The warranty does not cover any  
such modification/adaptation, irrespective of whether it was  
carried out properly or not. Under the terms of this warranty,  
BEHRINGER shall not be held responsible for any cost resulting  
from such a modification/adaptation.  
§ 1 OTHER WARRANTY RIGHTS AND NATIONAL LAW  
1. This warranty does not exclude or limit the buyer’s statutory  
rights provided by national law, in particular, any such rights  
against the seller that arise from a legally effective purchase  
contract.  
2. The warranty regulations mentioned herein are applicable  
unless they constitute an infringement of national warranty law.  
§ 2 ONLINE REGISTRATION  
3. Free inspections and maintenance/repair work are expressly  
excluded from this warranty, in particular, if caused by improper  
handling of the product by the user. This also applies to defects  
caused by normal wear and tear, in particular, of faders,  
crossfaders, potentiometers, keys/buttons, tubes, guitar strings,  
illuminants and similar parts.  
Please do remember to register your new BEHRINGER equipment  
conditions of our warranty carefully.  
Registering your purchase and equipment with us helps us  
process your repair claims quicker and more efficiently.  
4. Damages/defects caused by the following conditions are not  
covered by this warranty:  
Thank you for your cooperation!  
V
improper handling, neglect or failure to operate the unit in  
compliance with the instructions given in BEHRINGER user  
or service manuals.  
§ 3 WARRANTY  
1. BEHRINGER (BEHRINGER International GmbH including all  
BEHRINGER subsidiaries listed on the enclosed page, except  
BEHRINGER Japan) warrants the mechanical and electronic  
components of this product to be free of defects in material and  
workmanship for a period of one (1) year* from the original date  
of purchase, in accordance with the warranty regulations  
described below. If the product shows any defects within the  
specified warranty period that are not excluded from this  
warranty as described under § 5, BEHRINGER shall, at its  
discretion, either replace or repair the product using suitable  
new or reconditioned parts. In the case that other parts are used  
which constitute an improvement, BEHRINGER may, at its  
discretion, charge the customer for the additional cost of these  
parts.  
V
V
connection or operation of the unit in any way that does  
not comply with the technical or safety regulations  
applicable in the country where the product is used.  
damages/defects caused by force majeure or any other  
condition that is beyond the control of BEHRINGER.  
5. Any repair or opening of the unit carried out by unauthorized  
personnel (user included) will void the warranty.  
6. If an inspection of the product by BEHRINGER shows that the  
defect in question is not covered by the warranty, the inspection  
costs are payable by the customer.  
7. Products which do not meet the terms of this warranty will be  
repaired exclusively at the buyer’s expense. BEHRINGER will  
inform the buyer of any such circumstance. If the buyer fails to  
submit a written repair order within 6 weeks after notification,  
BEHRINGER will return the unit C.O.D. with a separate invoice  
for freight and packing. Such costs will also be invoiced  
separately when the buyer has sent in a written repair order.  
2. If the warranty claim proves to be justified, the product will be  
returned to the user freight prepaid.  
3. Warranty claims other than those indicated above are expressly  
excluded.  
§ 4 RETURN AUTHORIZATION NUMBER  
§ 6 WARRANTY TRANSFERABILITY  
1. To obtain warranty service, the buyer (or his authorized dealer)  
must call BEHRINGER (see enclosed list) during normal business  
hours BEFORE returning the product. All inquiries must be  
accompanied by a description of the problem. BEHRINGER will  
then issue a return authorization number.  
This warranty is extended exclusively to the original buyer  
(customer of retail dealer) and is not transferable to anyone  
who may subsequently purchase this product. No other person  
(retail dealer, etc.) shall be entitled to give any warranty promise  
on behalf of BEHRINGER.  
2. Subsequently, the product must be returned in its original  
shipping carton, together with the return authorization number to  
the address indicated by BEHRINGER.  
§ 7 CLAIM FOR DAMAGES  
Failure of BEHRINGER to provide proper warranty service shall  
not entitle the buyer to claim (consequential) damages. In no  
event shall the liability of BEHRINGER exceed the invoiced value  
of the product.  
3. Shipments without freight prepaid will not be accepted.  
§ 5 WARRANTY REGULATIONS  
1. Warranty services will be furnished only if the product is  
accompanied by a copy of the original retail dealer’s invoice.  
Any product deemed eligible for repair or replacement under the  
terms of this warranty will be repaired or replaced.  
* Customers in the European Union please contact BEHRINGER  
Germany Support for further details.  
Technical specifications and appearance subject to change without notice. The information contained herein is correct at the time of printing. The names  
of companies, institutions or publications pictured or mentioned and their respective logos are registered trademarks of their respective owners. Their use  
neither constitutes a claim of the trademarks by BEHRINGER nor affiliation of the trademark owners with BEHRINGER. BEHRINGER accepts no  
liability for any loss which may be suffered by any person who relies either wholly or in part upon any description, photograph or statement contained  
herein. Colours and specification may vary slightly from product. Products are sold through our authorised dealers only. Distributors and dealers are not  
agents of BEHRINGER and have absolutely no authority to bind BEHRINGER by any express or implied undertaking or representation. No part of this  
manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording of any kind, for  
any purpose, without the express written permission of BEHRINGER International GmbH. BEHRINGER® is a registered trademark.  
ALL RIGHTS RESERVED. © 2006 BEHRINGERInternational GmbH,  
Hanns-Martin-Schleyer-Str. 36-38, 47877 Willich-Münchheide II, Germany.  
Tel. +49 2154 9206 0, Fax +49 2154 9206 4903  
14  
6. WARRANTY  
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ULTRACOUSTIC ACX1000  
FEDERAL COMMUNICATIONS COMMISSION  
COMPLIANCE INFORMATION  
Responsible party name:  
Address:  
BEHRINGER USA, Inc.  
18912 North Creek Parkway, Suite 200  
Bothell, WA 98011, USA  
Phone/Fax No.:  
Phone: +1 425 672 0816,  
Fax:  
+1 425 673 7647  
hereby declares that the product  
ULTRACOUSTIC ACX1000  
complies with the FCC rules as mentioned in the following paragraph:  
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15  
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a  
residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed  
and used in accordance with the instructions, may cause harmful interference to radio communications. However,  
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful  
interference to radio or television reception, which can be determined by turning the equipment off and on, the  
user is encouraged to try to correct the interference by one or more of the following measures:  
V
V
V
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  
V
Consult the dealer or an experienced radio/TV technician for help.  
This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this  
device may not cause harmful interference, and (2) this device must accept any interference received, including  
interference that may cause undesired operation.  
Important information:  
Changes or modifications to the equipment not expressly approved by BEHRINGER USA can void the user’s authority  
to use the equipment.  
15  
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