SRM550 • SRM650 • SRM750
1600W POWERED LOUDSPEAKERS
O W N E R ’ S M A N U A L
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Contents
Features
Important Safety Instructions .................................. 2
• 1600W system power paired with custom
transducers deliver gig-level volumes with
room to spare
Contents................................................................. 3
Features................................................................. 3
Introduction............................................................ 4
How To Use This Manual ......................................... 4
Getting Started....................................................... 4
Things To Remember................................................ 4
Hookup Diagrams.................................................... 5
• 12" high-output LF driver / 1.4" titanium dome
compression driver [SRM550]
• 15" high-output LF driver / 1.4" titanium dome
compression driver [SRM650]
• 2 x 15" high-output LF driver / 1.4" titanium
dome compression driver [SRM750]
• “Built-Like-A-Tank” all-wood, internally
braced cabinet delivers professional-grade
road-worthiness
SRM Loudspeaker: Rear Panel Features.................... 9
1. Power Connection ......................................... 9
2. Power Switch............................................... 9
3. XLR and 1/4" Combo Inputs.......................... 9
4. Gain Knobs................................................. 10
5. RCA Inputs [Channel 2 Only] ....................... 10
6. Thru Output................................................ 11
7. Ch 1/Mix Switch [Thru Output]................... 11
8. Speaker Mode ............................................ 11
9. Feedback desTROYer................................... 11
10. Main Logo Switch / Limit LED.................... 12
11. Extra Knobs, Buttons and LEDs .................. 12
12. Rock ‘n Roll.............................................. 12
• Rugged 18-gauge steel grille and fine-textured,
sleek black cabinet finish
• Front ported for maximum low-end extension
and punch
• High-Definition Audio Processing for professional
sound with unmatched clarity
• Patented acoustic correction developed with
touring geniuses at EAW®
• Precision 2-way digital crossover
• Driver time alignment and phase correction
• Quick one-button Speaker Mode selection
for application-specific voicing (PA, DJ, Monitor,
Soloist, Fill and Speech)
Smart Protect ....................................................... 13
Limiting.......................................................... 13
Overexcursion Protection ................................ 13
Thermal Protection.......................................... 13
• Effortlessly eliminate nasty feedback with
one-button automatic Feedback Destroyer
• Integrated 2-channel mixer featuring dual
Wide-Z™ inputs
AC Power............................................................. 13
Care and Maintenance ........................................... 13
• Handles anything from mics to guitars to
mixers with a single twist of the gain knob
• Includes stereo RCA inputs for easy connection
to music source
Placement............................................................. 14
Room Acoustics............................................... 15
• Perfect for the singer/songwriter,
plug in and leave the mixer at home
Rigging ............................................................... 16
Rigging Design Practices.................................. 16
Rigging Hardware and Accessories................... 16
Rigging Notes................................................. 16
Important Rigging Reminder ............................ 17
• Smart Protect™ DSP kicks in to protect
your investment when things get pushed
a little too hard
• Flyable via standard M10 eyebolts
Appendix A: Service Information............................ 18
Appendix B: Connections ....................................... 20
Appendix C: Technical Information .......................... 21
SRM550 Dimensions & Frequency Response..... 23
SRM650 Dimensions & Frequency Response..... 24
SRM750 Dimensions & Frequency Response..... 25
SRM Loudspeaker Block Diagram ..................... 26
• Monitor-specific 60˚ angle and voicing
mode perfect for cutting through on stage
[SRM550 / SRM650]
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Limited Warranty.................................................. 27
Part No. SW0985 Rev. B 07/14
©2014 LOUD Technologies Inc. All Rights Reserved.
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Owner’s Manual
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Introduction
Getting Started
SRM 1600W High-Definition Powered
The following steps will help you set up the
loudspeakers quickly.
Loudspeakers deliver a new level of SRM ruggedness,
clarity and simplicity with unmatched bass response.
Huge system power is paired with custom transducers
within professional-grade, internally-braced all-wood
cabinets that are “Built-Like-A-Tank”.
1. Make all initial connections with the power
switches OFF on all equipment. Make sure the master
volume, level, or gain controls are all the way down.
2. Connect the line-level outputs from the mixing
console (or other signal source) to the inputs on the
rear panel of the SRM loudspeakers.
These SRM loudspeakers feature our High Definition
Audio Processing™, including patented acoustic
correction DSP, plus system optimization tools like
application-specific speaker modes and an amazingly
accurate feedback destroyer.
3. Make sure that the loudspeaker’s gain knobs are set
to (or near) “line”.
Ready for anything, the integrated 2-channel mixer
with Wide-Z™ inputs can handle any signal with ease.
These SRM loudspeakers deliver the high output,
amazing sound and proven durability you demand
for your professional PA system.
4. Connect the supplied AC power cords to the
IEC sockets on the rear panel of each loudspeaker.
Plug the other end into an AC outlet properly configured
with the correct voltage as indicated below the IEC
socket.
5. Turn the mixer (or other signal source) on.
6. Turn the loudspeakers on.
How to Use This Manual:
7. Start the signal source and raise the mixer’s
main L/R fader up until audio may be heard
through the loudspeakers.
After this introduction, a getting started guide
will help you get things set up fast. The hookup
diagrams show some typical setups, while the
remaining sections provide details of the SRM550,
SRM650 and SRM750 loudspeakers.
8. Adjust the master volume of the mixer to a
comfortably loud listening level.
9. Read the rest of this manual to learn how to set the
speaker mode and feedback destroyer to really dial in a
sound for the venue.
This icon marks information that is critically
important or unique to the loudspeakers.
For your own good, read and remember them.
Things to Remember:
• Never listen to loud music for prolonged periods.
Please see the Safety Instructions on page 2 for
information on hearing protection.
• As a general guide, SRM loudspeakers should
be turned on last, after any mixer or other signal
source. As such, they should also be turned off
first. This will reduce the possibility of any turn-on
or turn-off thumps and other noises generated
by any upstream equipment from coming out of
the speakers.
Please write your serial number here for future
reference (i.e., insurance claims, tech support,
return authorization, make dad proud, etc.)
Purchased at:
• Save the shipping boxes and packing materials!
You may need them someday. Besides, the
cats will love playing in them and jumping out at
you unexpectedly. Remember to pretend like you
are surprised!
Date of purchase:
• Save your sales receipt in a safe place.
4
SRM550 • SRM650 • SRM750 Powered Loudspeakers
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Hookup Diagrams
SIG/OL
SIG/OL
SIG/OL
SIG/OL
POWER CONSUMPTION 200W
SIG/OL
SIG/OL
SRM loudspeakers are the perfect tool for singer-songwriters touring the local coffee shops. Bring your
favorite axe and mic, SRM loudspeakers and cables and power cords.
In this example, a dynamic microphone is connected to the channel 1 input of an SRM650 loudspeaker.
Be sure that the gain knob is set to “mic” in order to get an extra boost for the mic. If anything other than
a microphone is attached to a channel input, make sure the gain knob is set to anything other than “mic”
[“line” is a safe bet]. From there, adjust the gain as described on page 10.
Now grab your axe and plug it directly into the channel 2 input. Or if you use effects, connect the guitar
to the effects input and another cable from the effects output to the channel 2 input. Set the channel two
gain knob to “line”.
An additional SRM550 or SRM650 loudspeaker is great for monitoring. Simply connect a cable from
the main SRM loudspeaker’s THRU jack to the monitor loudspeaker’s channel 1 input [gain knob set to
“line”]. Also, make sure the Ch 1/Mix switch is down on the main SRM, as well, so a mix of
the vocals and guitar is relayed to the monitor.
For the output, you will want to set a speaker mode, described in detail on page 11. For this type
of setup, PA works well for the main SRM650. However, don’t count out the soloist mode! It has a
nice low cut and a brilliant high end. Select the monitor mode for the SRM550 monitor. Lastly, you
can ring out before you play, utilizing the SRM’s feedback destroyer [page 11] or just let it kill the
feedback while playing.
Small Coffee Shop
5
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Hookup Diagrams continued...
SIG/OL
SIG/OL
SIG/OL
SIG/OL
SIG/OL
SIG/OL
MIC
MIC
MIC
MIC
(UNBALANCED)
L
L
TAPE
IN
TAPE
OUT
R
R
PROFESSIONAL MIC/LINE MIXER WITH FX
LINE
HI-Z
1
2
3/4
5/6
7/8
(MONO)
(MONO)
(MONO)
(MONO)
BAL
/
BAL
/
UNBAL
L
L
L
L
UNBAL
L
BAL
/
BAL
/
BAL
/
BAL
/
BAL
/
LINE/HI-Z IN
1
LINE IN
2
LINE IN
LINE IN
3
4
LINE IN
LINE IN
5
6
LINE IN
7
8
UNBAL
UNBAL
UNBAL
UNBAL
MON SEND
UNBAL
FOOTSWITCH
BAL
UNBAL
/
R
R
R
R
R
INSERT
U
INSERT
LINE IN
U
ST RETURN
FX SEND
MAIN OUT
PHONES
STEREO GRAPHIC EQ
U
POWER CONSUMPTION 200W
POWER CONSUMPTION 200W
LEV
SET
LE
SET
LEVEL
SET
LEVEL
SET
15
10
15
10
48V
U
+
5
0
U
+
5
0
U
+5
0
U
+5
0
-20 +20
GAIN
PHANTOM
POW
-20dB
+30dB
-20dB
+30dB
5
0
5
0
ER
GAIN
GAIN
GAIN
GAIN
LOW CUT
100Hz
SRM
550
LOW CUT
100 Hz
LOW CUT
100 Hz
LOW CUT
100 Hz
5
5
P
OWER
U
EQ
U
EQ
U
EQ
U
EQ
U
EQ 10
15
12kHz
10
15
H
I
H
I
H
I
H
I
HI
MAIN
12kHz
12kHz
12kHz
12kHz
METERS
125
250
500
1K
2K
4K
8K
SRM
650
0dB=0dBu
-15 +15
U
-15 +15
U
-15 +15
U
-15 +15
U
-15 +15
U
OL
15
10
6
MAIN MIX
MON
EQ IN
BYPASS
M
I
D
H
M
I
D
H
M
I
D
H
M
I
D
H
MID
2.5 Hz
2
.
5k
z
2
.
5k
z
2
.
5k
z
2
.
5k
z
k
-15 +15
U
-15 +15
U
-15 +15
U
-15 +15
U
-15 +15
U
3
USB
0
VAR
L
O
W
L
O
W
L
O
W
L
O
W
LOW
80Hz
FX PRESETS
80Hz
80Hz
80Hz
80Hz
2
0
1
B
R
I
G
H
T
ROOM
4
0
2
W
A
R
M
LOUNGE
-15 +15
U
-15 +15
U
-15 +15
U
-15
U
-15 +15
U
U
0
3
S
M
A
L
L
S
T
A
G
E
7
0
4
W
A
R
M
T
H
E
A
TER
AUX
MON
AUX
MON
AUX
MON
AUX
MON
AUX
MON
05
W
A
R
M
H
A
L
L
10
20
30
0
6
C
O
N
C
E
R
T
HALL
0
7
P
C
L
A
A
T
E
REVERB
O
O
+20
08
THEDRAL
0
9
CHORUS
INPUT LEVEL
L
R
O
O
U
+15
O
O
U
+15
O
O
U
+15
O
O
U
+15
O
O
U
+15
1
0
C
H
O
R
U
S
+
REV
PRESETS
11
DOUBLER
12
T
A
P
E
S
LAP
1
3
D
E
L
L
L
A
A
A
Y
Y
Y
1
2
3
(
3
8
8
0
0
0
0
m
m
m
s
s
s
)
)
)
MUTE
FX
FX
FX
FX
FX
1
4
D
E
(
3
15
DE
(
4
USB THRU
BREAK
O
O
+15
O
O
+15
O
O
+
O
+15
O
O
+15
16
R
E
V
E
R
B
+
D
L
Y
(250ms)
(MUTES ALL CHANNELS)
PAN
PAN
PAN
PAN
PAN
U
U
U
OL
O
O
+15
O
O
PHO ONES
T
L
R
L
R
L
R
L
R
L
R
O
O
+15
O
MAX
+20
APE LEVEL
FX MASTER
FX TO MON
MUTE
MUTE
MUTE
3/4
MUTE
5/6
MUTE
7/8
MUTE
OL
MON
MAIN
dB
OL
OL
OL
OL
OL
1
2
ST RTN
FX RTN
dB
10
dB
10
dB
10
dB
10
dB
10
dB
10
dB
10
dB
10
10
5
5
5
5
5
5
5
5
5
U
5
U
5
U
5
U
5
U
5
U
5
U
5
U
5
U
5
10
10
10
10
10
10
10
10
10
20
30
20
30
20
30
20
30
20
30
20
30
20
30
20
30
20
30
40
50
60
40
50
60
40
50
60
40
50
60
40
50
60
40
50
60
40
50
60
40
50
60
40
50
60
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
SRM
550
SRM
650
VAR
POWER CONSUMPTION 200W
In this example, an SRM1850 subwoofer and additional SRM650 loudspeaker have been added to the
mix, giving our sound system some extra beef. It is a perfect setup for a small club.
Here, the L/R outputs of a ProFX8 mixer are connected directly to the channel A and B inputs of a single
SRM1850 subwoofer.
The channel A and B high pass outputs of the SRM1850 subwoofer are connected directly to the channel
1 inputs of each SRM650 loudspeaker. Be sure that the gain knob on each is set to “line” or get ready to
be blasted! Select the SRM650 high pass mode on the SRM1850 for a matched system.
SRM loudspeakers are also perfect for use as stage monitors. Simply connect a cable from each aux send
to the channel 1 input of each SRM loudspeaker used as a monitor.
For the output, you will want to set a speaker mode, described in detail on page 11. For this type of
setup, we recommend selecting the PA speaker mode for live sound on your SRM loudspeakers. If using
any SRM loudspeakers as monitors, select the monitor speaker mode.
Small Club System
6
SRM550 • SRM650 • SRM750 Powered Loudspeakers
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Hookup Diagrams continued...
SIG/OL
SIG/OL
SIG/OL
SIG/OL
SIG/OL
SIG/OL
SRM
650
SRM
750
VAR
SRM
650
SRM
650
SRM
750
SRM
750
VAR
VAR
POWER CONSUMPTION 200W
POWER CONSUMPTION 200W
SRM
650
SRM
650
SRM
750
SRM
750
VAR
VAR
POWER CONSUMPTION 200W
POWER CONSUMPTION 200W
Feel the awesome power! In this example, a pair of SRM2850 subwoofers line each side of the venue...
four subs total! The top sub on each side is connected to an SRM750 loudspeaker. This fully powered PA
is desired when you really need a slammin’ system with deep, commanding lows and nice, crisp highs.
Here, the L/R outputs of a DL1608 mixer are connected directly to the channel A input of each
bottom SRM2850 subwoofer. The channel A full range output of each (bottom) SRM2850 subwoofer
is connected directly to the channel 1 input of each (top) SRM2850 subwoofer.
From here, the channel A high pass output of each (top) SRM2850 subwoofer is connected directly to the
channel 1 input of each SRM750 loudspeaker. Be sure that the gain knob on each is set to “line” or get
ready to be blasted! Select the SRM750 high pass mode on the SRM2850 for a matched system.
***Please note that the SRM750 loudspeakers are stacked on top of the SRM2850 subwoofers, not
pole-mounted. SRM750s may be pole-mounted on a tripod stand, but must be stacked on subwoofers.
BIG PA
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Hookup Diagrams continued...
To next SRM
loudspeaker
input
To next SRM
loudspeaker
input
Main
Outs
SIG/OL
SIG/OL
SIG/OL
SIG/OL
SIG/OL
SIG/OL
SIG/OL
SIG/OL
DL806 Mixer
SRM loudspeakers may be daisy-chained via the male XLR connector labeled “THRU”. Simply plug the
signal source (i.e., mixer output) into the input jack(s), and patch that loudspeaker’s THRU jack to the
next loudspeaker’s input jack, and so on, daisy-chaining multiple SRM loudspeakers. Make sure that
the Ch 1 / Mix button is OUT [Ch 1]. See above for a visual representation of daisy-chaining.
Daisy-Chaining Multiple SRM Loudspeakers
8
SRM550 • SRM650 • SRM750 Powered Loudspeakers
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SRM Loudspeaker: Rear Panel Features
2.Power Switch
8
9
10
Press the top of this rocker switch inwards to turn
on the loudspeaker. The front panel Running Man
logo will glow with happiness...or at least it will
if the loudspeaker is plugged into a suitable live
AC mains supply and the main logo switch [10]
is disengaged.
SIG/OL
SIG/OL
4
3
7
6
Press the bottom of this rocker switch inwards to turn
off the loudspeaker.
5
As a general guide, SRM loudspeakers should
be turned on last, after any mixer or other
signal source. As such, they should also be
turned off first. This will reduce the possibility of any
turn-on or turn-off thumps and other noises generated
by any upstream equipment from coming out of the
speakers.
3.XLR and 1/4" Combo Inputs
Both channels feature 1/4" Wide-Z™ inputs with
combo jacks that may accept balanced/unbalanced XLR
and 1/4" connections. The gain range of the Wide-Z
inputs may handle anything from an instrument level to
a high-output mic signal. Simply connect an XLR, TRS
or TS connector into the channel and adjust the gain
accordingly.
11
Please be aware of the position of the gain
knob [4].
NEVER connect the output of an amplifier
directly to the input of the loudspeaker.
This could damage the input circuitry
of the active loudspeaker.
2
1
They are wired as follows, according to standards
specified by the AES (Audio Engineering Society):
Balanced XLR Input Connector
POWER CONSUMPTION 200W
Pin 1 – Shield (ground)
Pin 2 – Positive (+ or hot)
Pin 3 – Negative (– or cold)
1.Power Connection
This is a standard 3-prong IEC power connector.
Connect the detachable power cord (included in
the packaging with the loudspeaker) to the power
receptacle, and plug the other end of the power
cord into an AC outlet.
2
SHIELD
COLD
HOT
1
3
SHIELD
COLD
HOT
1
3
Make sure that the AC power is matched to
the AC power indicated on the rear panel
(below the IEC receptacle).
2
Balanced XLR Input Connector
Disconnecting the plug’s ground pin is
dangerous. Don’t do it!
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SRM Loudspeaker: Rear Panel Features continued...
To connect balanced lines to these inputs, use a
1/4" Tip-Ring-Sleeve (TRS) plug. “TRS” stands for
8
9
10
Tip-Ring-Sleeve, the three connection points
available on a stereo 1/4" or balanced phone jack
or plug. TRS jacks and plugs are used for balanced
signals and stereo headphones and are wired as follows
according to standards specified by the AES (Audio
Engineering Society):
SIG/OL
SIG/OL
Balanced 1/4" TRS Connector
Sleeve – Shield (ground)
Tip – Positive (+ or hot)
Ring – Negative (– or cold)
4
3
7
6
RING SLEEVE
TIP
SLEEVE RINGTIP
5
RING
TIP
SLEEVE
The accompanying LED will illuminate red when the
amplifier in the SRM loudspeaker is near the clipping
point. It is okay if this LED blinks occasionally, because
this means that the transient peaks are just reaching
the maximum output of the amplifiers and you are
getting the most out of your loudspeaker.
Balanced 1/4" TRS Connector
To connect unbalanced lines to these inputs, use a
1/4" mono (TS) phone plug, wired as follows according
to standards specified by the AES (Audio Engineering
Society):
If connecting mixer outputs to loudspeaker
inputs, set the gain knob to 10:00 [“Line”]
for optimal sound and performance.
Unbalanced 1/4" TS Connector
Sleeve – Shield (ground)
Tip – Positive (+ or hot)
5. RCA Inputs [Channel 2 Only]
The stereo unbalanced RCA inputs allow you to
play a CD player, iPod®, or other line-level source.
The RCA jacks accept an unbalanced signal using
standard hi-fi [RCA] hookup cables.
SLEEVE
SLEEVE
TIP
TIP
TIP
NEVER connect the output of an amplifier
directly to the input of the loudspeaker.
This could damage the input circuitry
of the active loudspeaker.
SLEEVE
Unbalanced 1/4" TS Connector
For more information on these connectors, see
Appendix B on page 20.
They are wired as follows, according to standards
specified by the AES (Audio Engineering Society):
Unbalanced RCA Connector
4. Gain Knobs
Sleeve – Shield (ground)
Tip – Positive (+ or hot)
The gain knobs adjust the input sensitivity of the
mic and mic/line/RCA inputs. This allows signals from
the outside world to be adjusted to run through each
channel at optimal internal operating levels.
SLEEVE
TIP
SLEEVE
TIP
There is – dB of gain with the knob fully down
(off), ramping up to 50 dB of gain fully up (max).
The accompanying LED will illuminate green when
the channel’s input signal is present, indicating signal.
It will remain lit so long as there is signal above
–20 dBu present in that channel.
Unbalanced RCA Connector
For more information on these connectors, see
Appendix B on page 20.
10
SRM550 • SRM650 • SRM750 Powered Loudspeakers
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SRM Loudspeaker: Rear Panel Features continued...
MON(itor) Speaker Mode – This mode features a
6. Thru Output
low frequency roll-off and a reduction around 2 kHz to
ensure maximum gain before feedback in monitor
applications.
This is a male XLR-type connector that produces
exactly the same signal that is connected to the
main input jack or a mix of channels 1 and 2. Use it to
daisy-chain several SRM loudspeakers together off
the same signal source(s).
SOLO(ist) Speaker Mode – This mode features
a low frequency roll-off to get rid of unwanted thumps
and adds boost and sparkle to mid-range and high
frequencies. This plug-and-play mode is perfect for
singer-songwriters.
They are wired as follows, according to standards
specified by the AES (Audio Engineering Society):
Balanced XLR Output Connector
Pin 1 – Shield (ground)
Pin 2 – Positive (+ or hot)
Pin 3 – Negative (– or cold)
8
9
10
SHIELD
1
3
COLD
3
2
HOT
SHIELD
COLD
HOT
1
2
FILL Speaker Mode – This mode features a mild
low frequency roll-off to ensure minimal on stage low
frequency build-up while providing a rich full range
response with plenty of mid-high cut through. This
plug-and-play mode is perfect for on stage monitor side
fill applications, as well as when facing audience areas
where a main FOH rig with subwoofers is present.
Balanced XLR Output Connector
See page 8 to learn more about daisy-chaining SRM
loudspeakers.
For more information on these connectors, see
Appendix B on page 20.
SPEECH Speaker Mode – This mode features a
significant low frequency roll-off to get rid of unwanted
thumps. It also adds boost and sparkle to mid-range and
high frequencies, critical for speech applications. This
plug-and-play mode is perfect for larger venue applica-
tions where speech is the primary audio source in need
of clear and precise intelligibility.
7. Ch 1/Mix Switch [Thru Output]
This switch allows you to choose whether only
the channel 1 signal (pre-gain) is sent out to the
next loudspeaker [switch out – Ch 1] or if a mix
of the channel 1 and 2 signals are sent out to the
next loudspeaker [switch in – Mix] (post-gains).
9. Feedback desTROYer:
The multi-band feedback destroyer hunts down
offending feedback frequencies and applies up to four
notch filters automatically to destroy feedback and
maximize gain prior to feedback. This is a great tool
for performers without a dedicated engineer.
8. Speaker Mode
Here you are able to change the loudspeaker’s
speaker mode to tailor it to best suit your particular
application. There are four modes available: PA, DJ,
Monitor and Soloist with each SRM550 and SRM650
and PA, DJ, Fill and Speech with each SRM750.
Press the speaker mode button repeatedly until the
LED of the speaker mode you desire is illuminated.
Refer to the Frequency Response graphs on pages
23–25 for further information.
The integrated and amazingly accurate Feedback
Destroyer instantly employs up to four incredibly
narrow 1/16th octave filters to locate and eradicate
feedback so you know you can perform fearlessly.
Plus, the entire system is protected by our Smart
Protect™ DSP which kicks in to protect your
PA Speaker Mode – This mode is full range, but
focuses on mid-range clarity where vocals often reside.
This is the place to start for most sound reinforcement
applications.
investment when things get pushed a little too hard.
DJ Speaker Mode – This mode bumps the lows and
highs with a mild tuck to the mids, perfect for music
playback.
11
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SRM Loudspeaker: Rear Panel Features continued...
Stadium – If the audience consists of the bartender,
10. Main Logo Switch / Limit LED
wait staff and significant others, engage this switch.
In between songs it will sound like a stadium filled
with adoring fans near and wide, not crickets.
The Running Man logo on the front of the SRM
loudspeaker illuminates when this switch is disengaged
and AC power is available at the mains input [1].
Engage the switch if you do not want the Running
Man logo to illuminate.
Even with all that, we’re still trying to figure out
what else our crazy engineers packed into these things!
The manual will be revised once we’ve discovered
what the other knobs, buttons and LEDs do.
SRM loudspeakers have a built-in limiter that
helps to prevent the amplifier outputs from clipping
or overdriving the transducers. The limit indicator
illuminates yellow when the limiter is activated.
It’s okay for it to blink yellow occasionally, but if
it blinks frequently or lights continuously, turn down
the gain knob [4] until it only blinks occasionally.
Until then, appreciate the joy of new discoveries!
Excessive limiting may lead to
overheating, which in turn trips the
thermal protect circuitry and interrupts
the performance. See ‘Thermal Protection’ on
page 13 for more information.
11. Extra Knobs, Buttons and LEDs
What’s cooler than extra bells and whistles on
a new toy? Well, a lot of things, I suppose, but that
didn’t stop us! The rear panel of each SRM loudspeaker
is stacked with a variety of extra knobs, buttons and
LEDs. The following is a list of just some of the features
and functions of each (in alphabetical order):
11
Beer Tap – What good is a live show without a pint or
two...or more? Simply push and hold in the momentary
switch until your pint glass is filled.
Liquor Tap – Not everyone is a beer drinker. That’s
why we installed the handy-dandy liquor tap, as well.
Modem – Are you old enough to remember the sound
of a modem? Press this switch once to have that sound
pour out the speakers. Press this switch twice if you
would rather hear the joyful sounds of a dot-matrix
printer instead.
12. Rock ‘n Roll
Congratulations, you have reached the end
of the features section! At this point, you should
have a pretty good understanding of how the SRM
loudspeakers function. If this is true, the next step is
to rock ‘n roll! If this is not true, head back to page 9
and read it all over again. The following pages
discuss SRM loudspeaker placement, room acoustics,
an in-depth look at rigging and Smart Protect, technical
information and more. Check it out!
My Favorite Band – Press the my favorite band
button repeatedly until your favorite band is displayed
on the silkscreen. Whatever song(s) you play through
these loudspeakers will sound like the band you
selected!
Sports – Music and sports demand two completely
different sets of sounds. If used as a sports PA, set the
switch to sports.
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Smart Protect
AC Power
There are advanced DSP protection mechanisms
designed to safeguard the loudspeakers and amplifiers
from inadvertent damage.
Be sure the SRM loudspeaker is plugged into an
outlet that is able to supply the correct voltage specified
for your model. It will continue to operate at lower
voltages, but will not reach full power.
The protection circuits are designed to
protect the loudspeakers under reasonable
and sensible conditions. Should you choose
to ignore the warning signs [e.g. excessive distortion],
you can still damage the speaker by overdriving it past
the point of amplifier clipping. Such damage is beyond
the scope of the warranty.
Be sure the electrical service can supply enough
amperage for all the components connected to it.
We recommend that a stiff (robust) supply of AC
power be used because the amplifiers place high
current demands on the AC line. The more power that is
available on the line, the louder the speakers will play
and the more peak output power will be available for a
cleaner, punchier bass. A suspected problem of “poor
bass performance” is often caused by a weak AC supply
to the amplifiers.
Limiting
The driver has its own compression circuit which
helps protect it from damaging transient peaks.
The compressor is designed to be transparent and
is not noticeable under normal operating conditions.
Never remove the ground pin on the power
cord or any other component of the SRM
loudspeaker. This is very dangerous.
Overexcursion Protection
The SRM550 and SRM650 use an 18 dB/octave high-
pass filter, while the SRM750 uses an 24 dB/octave But-
terworth high-pass filter just prior to the low-frequency
amplifier. This prevents very low frequencies from being
amplified. Excessive low-frequency energy can damage
the woofer by causing it to “bottom out,” also know as
overexcursion, which is equivalent to a mechanical form
of clipping.
Care and Maintenance
These loudspeakers will provide many years
of reliable service if you follow these guidelines:
•
Avoid exposing the loudspeakers to moisture.
If they are set up outdoors, be sure they are
under cover if rain is expected.
Thermal Protection
•
Avoid exposure to extreme cold (below
freezing temperatures). If you must operate
the loudspeakers in a cold environment, warm
up the voice coils slowly by sending a low-level
signal through them for about 15 minutes prior
to high-power operation.
All amplifiers produce heat. SRM loudspeakers are
designed to be efficient both electrically and thermally.
In the unlikely event of the amplifier overheating,
a built-in thermal switch will activate, muting the
signal.
•
Use a dry cloth to clean the cabinets. Only do
this when the power is turned off. Avoid getting
moisture into any of the openings of the
cabinet, particularly where the drivers are
located.
When the amplifier has cooled down to a safe
operating temperature, the thermal switch resets itself,
and the SRM loudspeaker resumes normal operation.
If the thermal switch activates, try turning down the
level control a notch or two on the mixing console (or
the back of the loudspeaker) to avoid overheating the
amplifier. Be aware that direct sunlight and/or hot stage
lights may be the culprit of an amplifier overheating.
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Placement
WARNING: Installation should only be done
These loudspeakers may also be flown via its fly
points as detailed on pages 16–17. Be sure to read the
PA-A2 Eyebolt Installation Instructions, as well.
by an experienced technician. Improper
installation may result in damage to the
equipment, injury or death. Make sure that the
loudspeaker is installed in a stable and secure way
in order to avoid any conditions that may be dangerous
for persons or structures.
These loudspeakers are NOT designed to array
horizontally. If you feel you must put two speakers
side-by-side, you should have a good understanding
of the relationship between the splay angle (the angle
between the facing sides of the cabinets) and frequency
cancellation effects between cabinets.
These loudspeakers are designed to sit on the
floor or stage as the main PA, monitors [SRM550 /
SRM650], or fill speakers [SRM750]. Check to make
sure that the support surface (e.g. floor, etc.) has the
necessary mechanical characteristics to support the
weight of the loudspeaker(s).
When two cabinets are positioned side-by-side
such that the rear-angled faces of the enclosures
are parallel, the splay angle will be 90º. This matches
the 90˚ horizontal coverage pattern of each individual
loudspeaker; the interference between the two cabinets
will be minimized, but the total coverage of 180˚ may
be too wide for some applications. The mid and high
frequencies may also be reduced for those in the center
who are too close to the loudspeakers.
They may also be pole-mounted via the built-in
socket on the bottom of the cabinet. Be sure the pole
is capable of supporting the weight of the loudspeaker.
When pole-mounting loudspeakers, be sure that they
are stabilized and secured from falling over or being
accidentally pushed over.
Reducing the splay angle will reduce the total
horizontal coverage, but it also creates an area both
speakers are covering. Instead of a nearfield hole,
The SPM200 is a great option when using an
SRM subwoofer, as it allows for greater extension
than most other poles available north of the South Pole. this will cause comb-filtering effects in the frequency
response in the overlapping area. The smaller the splay
Please note that SRM750 loudspeakers
angle, the more energy will be delivered on-axis, but the
should not be pole-mounted via SPM200.
comb-filtering effects will get worse at the same time.
Instead, it should be stacked on top of the
subwoofer. It is highly suggested that straps are utilized.
To reiterate, failure to follow these precautions may
result in damage to the equipment, personal injury,
or death.
To reiterate, though, we strongly suggest
NOT arraying these loudspeakers horizontally.
Experimentation and experience will help you find
the right trade-off for your application.
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Room Acoustics
SRM loudspeakers are designed to sound fantastic
in nearly every application.
•
Highly reverberant rooms, like many
gymnasiums and auditoriums, are a
nightmare for sound system intelligibility.
Multiple reflections off the hard walls, ceiling,
and floor play havoc with the sound. Depending
on the situation, you may be able to take some
steps to minimize the reflections, such as
putting carpeting on the floors, closing
draperies to cover large glass windows, or
hanging tapestries or other materials on the
walls to absorb some of the sound.
But, room acoustics play a crucial role in the overall
performance of a sound system. Here are some
additional placement tips to help overcome some
typical room problems that might arise:
•
Placing loudspeakers in the corners of a room
increases the low frequency output and can
cause the sound to be muddy and indistinct.
•
Placing loudspeakers against a wall increases
the low frequency output, though not as much
as corner placement. However, this is a good
way to reinforce the low frequencies, if so
desired.
However, in most cases, these remedies are not
possible or practical. So what do you do?
Making the sound system louder generally
doesn’t work because the reflections become
louder, too. The best approach is to provide as
much direct sound coverage to the audience
as possible. The farther away you are from
the speaker, the more prominent will be the
reflected sound.
•
•
Avoid placing the speakers directly on a
hollow stage floor. A hollow stage can resonate
at certain frequencies, causing peaks and dips
in the frequency response of the room. It is
better to place them on a sturdy stand designed
to handle the weight of the loudspeaker.
Use more speakers strategically placed so they
are closer to the back of the audience. If the
distance between the front and back speakers
is more than about 100 feet, you should use a
delay processor to time-align the sound. (Since
sound travels about 1 foot per millisecond, it
takes about 1/10 of a second to travel 100 feet.)
Position the loudspeakers so the high-
frequency drivers are two to four feet above
ear level for the audience (making allowances
for an audience that may be standing/dancing
in the aisles). High frequencies are highly
directional and tend to be absorbed much
easier than lower frequencies. By providing
direct line-of-sight from the loudspeakers
to the audience, you increase the overall
brightness and intelligibility of the sound
system.
Keep in mind that the speaker mode and feedback
destroyer are two great ways to compensate for some of
these issues. See page 11 for more information [8, 9].
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Rigging Hardware and Accessories
Rigging
Rigging our loudspeakers will invariably require
hardware not supplied by us. Various types of
SRM loudspeakers may be individually flown
using a PA-A2 Eyebolt Kit, part number 0028272
[M10 x 1.5 x 37 mm forged shoulder eyebolts].
load-rated hardware are available from a variety
of third-party sources. There are a number of such
companies specializing in manufacturing hardware
for, designing, and installing rigging systems. Each
one of these tasks is a discipline in its own right.
Because of the hazardous nature of rigging work
and the potential liability, engage companies that
specialize in these disciplines to do the work required.
WARNING: Installation should only be done
by an experienced technician. Improper
installation may result in damage to the
equipment, injury or death. Make sure that the
loudspeaker is installed in a stable and secure way
in order to avoid any conditions that may be dangerous
for persons or structures.
We do offer certain accessory rigging items and some
of them may be used with a variety of products. While
these accessories are intended to facilitate installation,
the wide variety of possible installation conditions and
array configurations do not permit us to determine their
suitability or load rating for any particular application.
WARNING: The cabinet is suitable for rigging
via its fly points. NEVER attempt to suspend
an SRM loudspeaker by its handle.
Rigging Design Practices
We are not in the business of providing complete
rigging systems, either as designers, manufacturers,
or installers. It is the responsibility of the installer to
provide a properly engineered, load-certified rigging
system for supporting the loudspeaker from structure.
Rigging a loudspeaker requires determining:
1. The rigging methods and hardware that meet static,
shock, dynamic, and any other load requirements for
supporting the loudspeaker from structure.
2. The design factor and required WLL (Working Load
Limit) for this support.
Rigging Notes
We strongly recommend the following rigging practices:
The SRM loudspeaker’s integral mounting points
are designed to support only the weight of their own
loudspeaker with suitable, external hardware. This
means that each SRM loudspeaker must be supported
independently of any other SRM loudspeaker and any
other loads. At least three rigging points must be used
to hang an SRM loudspeaker.
1. Documentation: Thoroughly document the design
with detailed drawings and parts lists.
2. Analysis: Have a qualified professional, such as a
licensed Professional Engineer, review and approve the
design before its implementation.
3. Installation: Have a qualified professional rigger do
the installation and inspection.
4. Safety: Use adequate safety precautions and
back-up systems.
3 Fly Points [SRM550 / SRM650]
MP = Mounting Point
MP
MP
MP
Top
Rear
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Important Rigging Reminder:
To reiterate, we are not in the business of providing
complete rigging systems, either as designers,
manufacturers, or installers. It is the responsibility
of the installer to provide a properly engineered,
load-certified rigging system for supporting the
loudspeaker from structure.
Top Fly
Points
Rear Fly Point
(adjusts angle)
*SRM750 only
10 Fly Points [SRM750]
MP = Mounting Point
MP
MP
Top
MP
MP
MP
MP
MP
Left and Right
MP
Bottom
Rear
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Appendix A: Service Information
If you think the SRM loudspeaker has a problem,
please check out the following troubleshooting tips and
do your best to confirm the problem. Visit the Support
will find lots of useful information such as FAQs and
other documentation. You may find the answer to the
problem without having to part with your loudspeaker.
Poor bass performance
• Check the polarity of the connections between the
mixer and the loudspeakers. You may have your
positive and negative connections reversed at one
end of one cable, causing one loudspeaker to be
out-of-phase with the other.
• Poor bass performance may be the result of bad
AC power. See the section titled ‘AC Power’ on
page 13 for further details.
Troubleshooting
No power
• Our favorite question: Is it plugged in? Make sure
the AC outlet is live [check with a tester or lamp].
Poor sound
• Is it loud and distorted? Make sure that you’re not
overdriving a stage in the signal chain. Verify that
all level controls are set properly.
• Our next favorite question: Is the power switch
on? If not, try turning it on.
• Is the Running Man logo on the front panel
illuminated? If not, make sure the AC outlet
is live. If so, refer to “No sound” below.
• Is the input connector plugged completely into
the jack? Be sure all connections are secure.
• The internal AC line fuse may be blown. This is
not a user serviceable part. If you suspect the
AC line fuse is blown, please see the "Repair"
section next.
Noise
• What is the position of the gain knob? It should
be at (or near) “mic” when a mic is connected
and at (or near) “line” when a line-level signal
is connected. It should be “off” for all unused
inputs.
No sound
• Is the input gain knob for the input source
turned all the way down? Verify that all the gain
knobs in the system are properly adjusted. Look
at the level meter to ensure that the mixer is
receiving a signal.
• Make sure all connections to the active
loudspeakers are good and sound.
• Make sure none of the signal cables are routed
near AC cables, power transformers, or other
EMI-inducing devices.
• Is the signal source working? Make sure the
connecting cables are in good repair and securely
connected at both ends. Make sure the output
level control on the mixing console is turned up
sufficiently to drive the inputs of the speaker.
• Is there a light dimmer or other SCR-based device
on the same AC circuit as the SRM loudspeaker?
Use an AC line filter or plug the loudspeaker into
a different AC circuit.
• Make sure the mixer does not have a mute on or a
processor loop engaged. If you find something like
this, make sure the level is turned down before
disengaging the offending switch.
• Has it shut down? Make sure there is at least
six inches of free space behind each SRM
loudspeaker.
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Hum
• Try disconnecting the cable connected to the main
input jack. If the noise disappears, it could be
a “ground loop,” rather than a problem with the
SRM loudspeaker. Try some of the following
troubleshooting ideas:
• Use balanced connections throughout your system
for the best noise rejection.
• Whenever possible, plug all the audio equipment’s
line cords into outlets which share a common
ground. The distance between the outlets and the
common ground should be as short as possible.
Repair
For warranty service, refer to the warranty
information on page 27.
Non-warranty service is available at a factory-
authorized service center. To locate the nearest
Tech Support” and select “Locate a Service Center
or Distributor” [3]. Service for SRM loudspeakers living
outside the United States can be obtained through local
dealers or distributors.
If you do not have access to our website, you may call
the Tech Support department at 1-800-898-3211,
Monday-Friday, during normal business hours, Pacific
Time, to explain the problem. Tech Support will tell you
where the nearest factory-authorized service center is
located in your area.
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Appendix B: Connections
Balanced XLR Input Connector
Balanced 1/4" TRS Connector
Each SRM loudspeaker has two female XLR/TRS/TS
combo inputs. Be sure the cables are wired per
AES (Audio Engineering Society) standards:
TRS stands for Tip-Ring-Sleeve, the three connections
available on a stereo 1/4" cable. This allows for a
direct connection to the channel 1 and 2 input jacks
on SRM loudspeakers. Be sure the cables are wired per
AES (Audio Engineering Society) standards:
Balanced XLR Input Connector
Pin 1 – Shield (Ground)
Pin 2 – Positive (+ or hot)
Pin 3 – Negative (– or cold)
Balanced 1/4" TRS Connector
Sleeve – Shield (Ground)
Tip – Positive (+ or hot)
2
SHIELD
Ring – Negative (– or cold)
HOT
RING SLEEVE
SLEEVE RINGTIP
1
3
COLD
TIP
SHIELD
COLD
HOT
1
RING
TIP
3
2
SLEEVE
Balanced XLR Input Connector
Balanced 1/4" TRS Connector
Unbalanced 1/4" TS Connector
TS stands for Tip-Sleeve, the two connections
available on a mono 1/4" cable. This allows for a
direct connection to the channel 1 and 2 input
jacks on SRM loudspeakers. Be sure the cables are
wired per AES (Audio Engineering Society) standards:
Balanced XLR Output Connector
There is also a male XLR output on each SRM
loudspeaker labeled “THRU”. Be sure the cables are
wired per AES (Audio Engineering Society) standards:
Unbalanced 1/4" TS Connector
Sleeve – Shield (Ground)
Tip – Positive (+ or hot)
Balanced XLR Output Connector
Pin 1 – Shield (Ground)
Pin 2 – Positive (+ or hot)
Pin 3 – Negative (– or cold)
SLEEVE
SLEEVE
TIP
SHIELD
1
TIP
TIP
3
COLD
3
2
HOT
SLEEVE
SHIELD
COLD
HOT
1
Unbalanced 1/4" TS Connector
2
Unbalanced RCA Connector
Balanced XLR Output Connector
RCA-type plugs (also known as phono plugs)
and jacks are often used in home stereo and video
equipment and in many other applications. RCA plugs
are unbalanced. Connect the signal to the center post
and the ground (earth) or shield to the surrounding
“basket.” Be sure the cables are wired per AES (Audio
Engineering Society) standards:
SRM loudspeakers may be daisy-chained via the male
XLR connector labeled “THRU”. Simply plug the signal
source (i.e., mixer output) into the input jack(s),
and patch that loudspeaker’s THRU jack to the next
loudspeaker’s input jack, and so on, daisy-chaining
multiple SRM loudspeakers. See page 8 for a visual
representation of daisy-chaining.
Unbalanced RCA Connector
Sleeve – Shield (Ground)
Tip – Positive (+ or hot)
SLEEVE
TIP
SLEEVE
TIP
Unbalanced RCA Connector
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Appendix C: Technical Information
SRM Loudspeaker Specifications
Acoustic Performance:
Input/Output
Frequency Response (–3 dB)
55 Hz–17 kHz [SRM550] Channel 1
50 Hz–17 kHz [SRM650]
42 Hz–20 kHz [SRM750]
Mic-Line
1/4" TRS, Wide-Z™
8 k balanced
1 M unbalanced
Frequency Response (–10 dB)
Max peak SPL
49 Hz–20 kHz [SRM550]
39 Hz–20 kHz [SRM650]
37 Hz–20 kHz [SRM750]
Channel 2
Mic-Line
8 k balanced
1/4" TRS, Wide-Z™
1 M unbalanced
25 k unbalanced
Male XLR balanced
132 dB [SRM550]
133 dB [SRM650]
135 dB [SRM750]
RCA
Thru
Crossover Point
3 kHz
[Passive when the Ch 1 / Mix switch
is in the “out” (Ch 1) position]
Dispersion [H x V]
90˚ x 50˚
[Active when the Ch 1 / Mix switch
is in the “in” (Mix) position]
High-Frequency Section
Voice Coil Diameter
Horn Entry Diameter
Diaphragm Material
Magnet Material
1.0 in / 25 mm
1.4 in / 36 mm
Titanium
Line Input Power
US detachable line cord
EU detachable line cord
AC Connector
100 – 120 VAC, 50 – 60 Hz, 200W
200 – 240 VAC, 50 – 60 Hz, 200W
3-pin IEC 250 VAC
Ferrite
Power Supply Type
Switchmode
Low-Frequency Section
Woofer Diameter
12 in/305 mm [SRM550]
15 in/381 mm [SRM650]
2x 15 in/381 mm [SRM750]
Safety Features
Voice Coil Diameter
2.6 in/66 mm [SRM550]
3.0 in/76 mm [SRM650]
2.5 in/64 mm [SRM750]
Input Protection
Peak and RMS limiting,
power supply and amplifier
thermal protection
Diaphragm Material
Magnet Material
Paper
Display LEDs
Defeatable front power ON
(Running Man logo), Front load
power limiter, Speaker Mode,
Feedback Destroyer, input signal
Ferrite
Power Amplifiers
System Power Amplification
Rated Power
Construction Features
Cabinet
800 watts rms
1600 watts peak
15 mm Poplar
Finish
High durability black paint
One on each side
Low Frequency Power Amplifier
Rated Power
Handles
Grille
400 watts rms
800 watts peak
Powder-coated 18 gauge steel
Fly Points
3x M10 x 1.5 x 37 mm [SRM550 / SRM650]
10x M10 x 1.5 x 37 mm [SRM750]
Rated THD
Cooling
< 1%
Convection
Class D
Monitor Angle
60˚ [SRM550 / SRM650]
Design
High Frequency Power Amplifier
Rated Power
400 watts rms
800 watts peak
Rated THD
Cooling
< 1%
Convection
Class D
Design
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SRM Loudspeaker Specifications continued...
Physical Properties
SRM550:
Height
Width
Depth
Weight
23.0 in / 585 mm
14.2 in / 360 mm
14.9 in / 377 mm
37 lb / 16.8 kg
SRM650:
Height
Width
26.7 in / 677 mm
17.5 in / 445 mm
17.4 in / 441 mm
46 lb / 21 kg
Depth
Weight
SRM750:
Height
Width
42.5 in / 1080 mm
17.5 in / 445 mm
18.0 in / 458 mm
89 lb / 40.4 kg
Depth
Weight
Mounting Methods
Floor mount, pole mount or fly via integrated M10 mounting
points (using M10 x 1.5 x 37 mm forged shoulder eyebolts).
See pages 16-17 for more information.
Options
SRM550 Cover
P/N 2036809-22
P/N 2036809-23
P/N 2036809-26
P/N 2035170-01
SRM650 Cover
SRM750 Cover
SPM200 Loudspeaker Pole Mount
PA-A2 Forged Shoulder Eyebolt Kit
(3 x M10 x 1.5 x 37 mm)
P/N 0028272
Disclaimer
Since we are always striving to make our products better by
incorporating new and improved materials, components, and
manufacturing methods, we reserve the right to change these
specifications at any time without notice.
The “Running Man” figure is a registered trademark of LOUD
Technologies Inc.
All other brand names mentioned are trademarks or registered
trademarks of their respective holders, and are hereby
acknowledged.
©2014 LOUD Technologies Inc.
All Rights Reserved.
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SRM550 Loudspeaker Dimensions
WEIGHT
37 lb
16.8 kg
23.0 in
22.6 in
575 mm
585 mm
14.2 in
14.9 in
360 mm
377 mm
14.9 in
60°
377 mm
10.9 in
15.9 in
278 mm
403 mm
SRM550 Loudspeaker Frequency Response
PA Speaker Mode – This mode is full range, but focuses
DJ Speaker Mode – This mode bumps the lows and highs
on mid-range clarity where vocals often reside.
with a mild tuck to the mids, perfect for music playback.
Soloist Speaker Mode – This mode features a low
frequency roll-off to get rid of unwanted thumps and adds
boost and sparkle to mid-range and high frequencies.
This mode is perfect for plug-and-play singer-songwriters.
Monitor Speaker Mode – This mode features a low
frequency roll-off and a reduction around 2 kHz to ensure
maximum gain before feedback in monitor applications.
+10
0
-10
-20
-30
-40
20
100
1000
Frequency (Hz)
20000
23
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SRM650 Loudspeaker Dimensions
WEIGHT
46 lb
21 kg
26.7 in
26.4 in
670 mm
677 mm
17.5 in
17.4 in
445 mm
441 mm
17.4 in
60°
441 mm
14.3 in
18.8 in
362 mm
476 mm
SRM650 Loudspeaker Frequency Response
PA Speaker Mode – This mode is full range, but focuses
DJ Speaker Mode – This mode bumps the lows and highs
on mid-range clarity where vocals often reside.
with a mild tuck to the mids, perfect for music playback.
Soloist Speaker Mode – This mode features a low
frequency roll-off to get rid of unwanted thumps and adds
boost and sparkle to mid-range and high frequencies.
This mode is perfect for plug-and-play singer-songwriters.
Monitor Speaker Mode – This mode features a low
frequency roll-off and a reduction around 2 kHz to ensure
maximum gain before feedback in monitor applications.
+10
0
-10
-20
-30
-40
20
100
1000
Frequency (Hz)
20000
24
SRM550 • SRM650 • SRM750 Powered Loudspeakers
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SRM750 Loudspeaker Dimensions
WEIGHT
89 lb
40.4 kg
42.5 in
42.5 in
1080 mm
1080 mm
17.5 in
445 mm
12.8 in
325 mm
17.5 in
18.0 in
458mm
18.0 in
458mm
445 mm
SRM750 Loudspeaker Frequency Response
PA Speaker Mode – This mode is full range, but focuses
DJ Speaker Mode – This mode bumps the lows and highs
on mid-range clarity where vocals often reside.
with a mild tuck to the mids, perfect for music playback.
Fill Speaker Mode – This mode features a mild low
frequency roll-off to ensure minimal on stage low frequency
build-up while providing a rich full range response with
plenty of mid-high cut through. This plug-and-play mode is
perfect for on stage monitor side fill applications, as well as
when facing audience areas where a main FOH rig with
subwoofers is present.
Speech Speaker Mode – This mode features a significant
low frequency roll-off to get rid of unwanted thumps. It also
adds boost and sparkle to mid-range and high frequencies,
critical for speech applications. This plug-and-play mode
is perfect for larger venue applications where speech
is the primary audio source in need of clear and precise
intelligibility.
+10
0
-10
-20
-30
-40
20
100
1000
Frequency (Hz)
20000
25
Owner’s Manual
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SRM Loudspeaker Block Diagram
26
SRM550 • SRM650 • SRM750 Powered Loudspeakers
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Limited Warranty
Please keep your sales receipt in a safe place.
This Limited Product Warranty (“Product Warranty”) is provided by LOUD Technologies Inc. (“LOUD”)
and is applicable to products purchased in the United States or Canada through a LOUD-authorized
reseller or dealer. The Product Warranty will not extend to anyone other than the original purchaser
of the product (hereinafter, “Customer,” “you” or “your”).
For products purchased outside the U.S. or Canada, please visit www.720trees.com to find contact
information for your local distributor, and information on any warranty coverage provided by the
distributor in your local market.
LOUD warrants to Customer that the product will be free from defects in materials and workmanship
under normal use during the Warranty Period. If the product fails to conform to the warranty then LOUD
or its authorized service representative will at its option, either repair or replace any such nonconforming
product, provided that Customer gives notice of the noncompliance within the Warranty Period to the
Company at: www.720trees.com or by calling LOUD technical support at 1.800.898.3211 (toll-free in
the U.S. and Canada) during normal business hours Pacific Time, excluding weekends or LOUD holidays.
Please retain the original dated sales receipt as evidence of the date of purchase. You will need it to obtain
any warranty service.
For full terms and conditions, as well as the specific duration of the Warranty for this product, please
visit www.720trees.com.
The Product Warranty, together with your invoice or receipt, and the terms and conditions located at
www.720trees.com constitutes the entire agreement, and supersedes any and all prior agreements
between LOUD and Customer related to the subject matter hereof. No amendment, modification or
waiver of any of the provisions of this Product Warranty will be valid unless set forth in a written
instrument signed by the party to be bound thereby.
Need help with your loudspeaker?
• Telephone 1-800-898-3211 to speak with one of our splendid technical support chaps
(Monday through Friday, normal business hours, Pacific Time).
27
Owner’s Manual
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16220 Wood-Red Road NE
Woodinville, WA 98072 • USA
Phone: 425.487.4333
Toll-free: 800.898.3211
Fax: 425.487.4337
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