Extron electronic Stereo Amplifier MPA 122 User Manual

User’s Manual  
MPA 122  
Mini Power Amplifier  
Extron Electronics, USA  
1230 South Lewis Street  
Anaheim, CA 92805  
USA  
Extron Electronics, Europe  
Beeldschermweg 6C  
3821 AH Amersfoort  
The Netherlands  
Extron Electronics, Asia  
135 Joo Seng Road, #04-01  
PM Industrial Building  
Singapore 368363  
Extron Electronics, Japan  
Daisan DMJ Building 6F  
3-9-1 Kudan Minami  
Chiyoda-ku, Tokyo 102-0074 Japan  
+81.3.3511.7655  
68-943-01 Rev. A  
11 04  
714.491.1500  
+31.33.453.4040  
+65.6383.4400  
Fax 714.491.1517  
Fax +31.33.453.4050  
Fax +65.6383.4664  
Fax +81.3.3511.7656  
© 2004 Extron Electronics. All rights reserved.  
 
Quick Start Guide — MPA 122  
To install and set up an MPA 122 Mini Power Amplifier, follow these steps:  
Step 1  
Turn all of the equipment off and disconnect it from the power  
source.  
Step 2  
Mount the MPA 122 on a rack, under a desk, or on a projector, as  
illustrated below.  
Extron  
Projector Mounting  
Bracket  
Extron  
MPA 122  
Mini Power  
Amplifier  
S
R
E
R
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P
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Extron  
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P U  
m
h
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2 2  
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1
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/ 8  
4
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M P  
M O  
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U S  
C
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Power Supply  
T S  
U
L
I N P  
E R  
W
P O  
Plastic Tie  
Under Desk  
Projector Mount  
DISTR  
IB  
UT  
ION  
AM  
PL  
IFIER  
D
IST  
VersaTools Rack Shelf  
RIB  
U
T
ION  
A
MP  
L
IFIER  
1/4 Rack Width False Front  
Face Plate  
DIS  
T
R
IB  
UTION  
AMPL  
Use 2 mounting holes on  
opposite corners  
IFIER  
(2) 4-40 x 3/16" screws  
Rack Mount  
Step 3  
Attach the speakers to the MPA 122.  
Step 4  
Attach inputs to the MPA 122 unit and the audio source and/or  
projector. Ensure that the projector’s audio output is set to variable  
out. Multiple input options (RCA, 3.5 mm stereo input, or captive  
screw) can be used simultaneously; this will result in audio mixing.  
See Inputs in chapter 2 for more information on these audio  
connections.  
Step 5  
Connect power cords to MPA 122 and other audio equipment.  
MPA 122 • Quick Start Guide QS-1  
 
Table of Contents  
Quick Start Guide — MPA 122, cont’d  
Chapter 1 • Introduction .......................................................... 1-1  
About this Manual ................................................................ 1-2  
About the MPA 122............................................................... 1-2  
Features ...................................................................................... 1-2  
Step 6  
Adjust the MPA 122 input level, bass and treble.  
a. If connecting to a projector, ensure that the volume on the device  
is at its lowest point, then adjust the level of the MPA 122 fully  
counterclockwise.  
LEVEL  
BASS  
TREBLE  
b. Set the projector volume to its maximum  
volume level (no sound should come  
out).  
Chapter 2 • Installation and Operation......................... 2-1  
Installation Overview.......................................................... 2-2  
MPA 122  
MINI POWER AMPLIFIER  
Mounting the MPA 122....................................................... 2-2  
Rack mounting....................................................................... 2-3  
Under-desk mounting ........................................................... 2-4  
Projector mounting ............................................................... 2-5  
c. Return to the MPA 122 and raise the level until sound distortion  
occurs, then lower slightly until distortion disappears. This  
setting ensures that, whatever the projector volume setting may  
be, no clipping occurs.  
d. Adjust bass and treble to preference.  
Rear Panel Features.............................................................. 2-6  
Power input ........................................................................... 2-7  
Audio inputs .......................................................................... 2-7  
Remote control ...................................................................... 2-8  
Audio output ......................................................................... 2-8  
8 ohm Ceiling  
Speakers  
in Parallel  
PC  
DVD  
VGA w/  
Audio Cable  
Audio RCA  
S-video  
Front Panel Features ............................................................ 2-8  
2
2
1
A
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O
4/8 Ohms  
S
U
Setting Up the MPA 122 Amplifier ............................... 2-9  
C
TE  
R
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EM  
V
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IN  
TE  
10  
/MU  
L
O
V
R
L
L
R
E
W
Remote connector wiring ................................................... 2-10  
O
P
Extron  
R
VCR  
MPA 122  
Mini Power Amplifier  
Composite  
Audio RCA  
Chapter 3 • Remote Operation ............................................ 3-1  
Remote Control Options .................................................... 3-2  
Variable  
Audio  
Output  
1
2
R
O
ECT  
OJ  
PR  
FF  
O
3
4
ON  
E
ComLink  
UM  
L
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IG  
F
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Appendix A • Specifications, Part Numbers,  
C
4
IP  
10  
LC  
M
E
UT  
M
P
U
L
VO  
VCM 100 AA  
and Accessories.............................................................................. A-1  
2
Extron  
MLC 104 IP  
Controller  
Extron  
Specifications ......................................................................... A-2  
Included Parts......................................................................... A-5  
Optional Accessories........................................................... A-5  
Projector  
3
VCM 100 AAP  
Volume/Mute Controller  
1
Remote Control Options  
IR Remote  
IR Remote - (input selection and volume control through projector)  
VCM 100 Volume/Mute Controller - (direct MPA 122 control)  
1
2
3
MLC 104 IP Controller - (input selection and volume control through projector)  
Typical connection setup  
MPA 122  
OUTPUTS  
4/8 Ohms  
INPUTS  
C
US  
L
POWER  
REMOTE  
All trademarks mentioned in this manual are the properties of their respective owners.  
R
10V  
VOL/MUTE  
R
L
12V  
3A MAX  
R
L
68-943-01 Rev. A  
11 04  
The Extron MPA 122 mini power amplifier  
MPA 122 • Quick Start Guide  
QS-2  
MPA 122 • Table of Contents  
iii  
 
Table of Contents, cont’d  
MPA 122  
Chapter One  
1
Introduction  
About this Manual  
About the MPA 122  
Features  
MPA 122 • Table of Contents  
iv  
 
Introduction  
Volume and mute remote control — The MPA 122 can be  
remotely controlled for volume adjustment and muting  
via connectivity to a rear panel, captive screw “Remote”  
input connector.  
About this Manual  
This manual contains information about the Extron MPA 122  
Mini Power Amplifier with instructions on how to mount and  
operate the unit.  
Flexible mounting options — The MPA 122 can be mounted on  
a rack, projector, or under furniture.  
About the MPA 122  
External international power supply — The autoswitchable,  
12 VDC, 3 A external power supply provides worldwide  
power compatibility (part #70-380-01).  
The Extron MPA 122 Mini Power Amplifier provides 2-channel  
power amplification for speaker systems in applications  
requiring compact, economical audio solutions. The MPA 122  
delivers 11 watts (rms) per channel into 4 ohms and  
7 watts (rms) into 8 ohms. It is optimized for driving four 8  
ohm ceiling speakers, two in parallel, per channel.  
The MPA 122 accepts balanced and unbalanced stereo inputs,  
and provides outputs as stereo or dual mono audio signals.  
Front panel controls are provided for input level, bass, and  
treble. The front panel also features switches for stereo/dual  
mono operation and a limiter switch which automatically  
reduces the gain to prevent distortion (amplifier clipping). The  
MPA 122 features remote control capability for volume  
adjustment and muting. As part of the VersaTools® line, the  
MPA 122 can be housed in a 1U, quarter rack width metal  
enclosure, mounted under a desk, or mounted on a projector.  
Features  
Digital audio amplifier — The MPA 122 features improved,  
class D technology for high efficiency and low distortion.  
Compact size — The MPA 122 is housed in a 1U high, 1/4 rack  
width, 3" deep, metal enclosure, making this amplifier a  
powerful product for many unique applications.  
Balanced and unbalanced audio inputs — Balanced or  
unbalanced stereo input is on a captive screw connector.  
The MPA 122 also includes RCA connectors and a 3.5 mm  
stereo mini jack for unbalanced input.  
Quick plug speaker outputs — Speaker output is on a captive  
screw connector for quick installation.  
Front panel controls — Input level, bass, and treble can be  
easily adjusted from the front panel.  
Limiter switch — The limiter switch prevents output distortion  
(clipping) and potential damage to speakers.  
Stereo/dual mono switch — Fits applications for both stereo  
program speakers or mono ceiling speakers.  
1-3  
MPA 122 • Introduction  
1-2  
MPA 122 • Introduction  
 
Introduction  
MPA 122  
Chapter Two  
2
Installation and Operation  
Installation Overview  
Mounting the MPA 122  
Rear Panel Features  
Front Panel Features  
Setting up the MPA 122 Amplifier  
MPA 122 • Introduction  
1-4  
 
Installation and Operation  
Installation Overview  
Rack mounting  
To install and set up an MPA 122, follow these steps:  
1.  
If feet were previously installed on the bottom of the  
MPA 122 unit, remove them.  
Turn all of the equipment off. Make sure that the input  
devices (DVD, VCR, PC, etc.), the MPA 122 unit, and the  
output devices are turned off and disconnected from their  
power source(s).  
1
2.  
Mount the unit on the rack shelf, using two  
4-40 x 3/16" screws in opposite (diagonal) corners to  
secure the MPA to the shelf.  
3.  
Install blank panel(s) or other unit(s) to the rack shelf.  
Mount the MPA 122 unit. See Mounting the MPA 122  
below.  
2
3
4.  
Insert the shelf into the rack, aligning the holes in the shelf  
with those in the rack.  
Attach the speakers and/or other output devices to the  
MPA 122. See Rear Panel Features later in this chapter for  
more information.  
5.  
Secure the shelf to the rack using the supplied machine  
screws.  
Attach inputs to the MPA 122. See Inputs later in this  
chapter for more information.  
4
Connect power cords to the MPA 122 and other devices.  
5
6
Adjust MPA 122 input level, bass and treble. See Setting  
up the MPA Amplifier later in this chapter for detailed  
information.  
DISTRIB  
U
TION AMPLIFIER  
DISTRIB  
VersaTools Rack Shelf  
1/4 Rack Width False Front  
UTION AMPLIFIER  
Mounting the MPA 122  
There are many optional accessories for mounting the MPA 122.  
They include the following:  
Face Plate  
VersaTools® multi-product projector mounting kit  
(part #70-374-01)  
DISTRIB  
U
Use 2 mounting holes on  
opposite corners  
TION AMPL  
IFIER  
(2) 4-40 x 3/16" screws  
1U universal VersaTools rack shelf  
1U basic VersaTools rack shelf  
1U universal rack shelf  
(part #60-190-20)  
(part #60-604-20)  
(part #60-190-01)  
(part #60-190-10)  
(part #60-604-01)  
(part #60-604-10)  
Figure 2-1 — Mounting the MPA 122 on the  
VersaTools® shelf  
Only products in the VersaTools® or IP Link lines can be  
mounted to a VersaTools shelf.  
1U 6" deep universal rack shelf kit  
1U basic rack shelf  
1U 6" deep basic rack shelf  
Mini under-desk mounting bracket kit  
(part #70-212-01)  
Following are detailed instructions on rack mounting, under-  
desk mounting, and projector mounting the MPA 122 unit (for  
use in classrooms, personal offices, meeting rooms, etc.).  
MPA 122 • Installation and Operation  
MPA 122 • Installation and Operation  
2-2  
2-3  
 
Installation and operation, cont’d  
1U Universal Rack Shelf  
1/2 Rack Width Front False  
Faceplate  
1/4 Rack Width Front False  
Faceplate  
Both front false faceplates  
use 2 screws.  
Figure 2-3 — Under-desk mounting  
Projector mounting  
In addition to mounting the MPA 122 unit to a rack or under  
furniture, it can also be projector mounted using the optional  
VersaTools® multi-product projector mounting kit  
(part #70-374-01).  
(2) 4-40 x 3/16"  
Screws  
Use 2 mounting holes on  
opposite corners.  
Figure 2-2 — Mounting the MPA 122 on the  
standard shelf  
Only VersaTools products and most IP Link products  
can be mounted using the multi-product projector  
mounting kit.  
Under-desk mounting  
In addition to using the MPA 122 unit on a rack or projector, it  
can also be mounted under furniture (or under a desk). Mount  
the unit by using the optional mounting kit (Extron part #70-  
212-01) for furniture, as follows:  
To projector mount the MPA 122, do the following:  
1.  
If necessary, remove the feet from the bottom of the device  
to be installed.  
1.  
2.  
3.  
Attach the mounting brackets to the amplifier with the  
machine screws provided (figure 2-3).  
2.  
Mount the MPA 122 to one of the bracket’s three mounting  
plates. The device can be vertically mounted facing either  
up or down, whichever is most convenient. See the  
illustration below.  
If feet were previously installed on the bottom of the  
interface, remove them.  
Hold the amplifier with the attached brackets against the  
underside of the table or other furniture. Mark the  
location of the screw holes of the bracket on the mounting  
surface.  
Use two supplied 4-40 x 3/16 screws in opposite  
(diagonal) corners to secure the device to the bracket.  
Rubber Pad  
4.  
5.  
6.  
7.  
Drill 3/32" (2 mm) diameter pilot holes, 1/4" (6.3 mm)  
deep in the mounting surface at the marked screw  
locations.  
Multi Product  
Projector Mounting Kit  
U-Bolt  
Insert #8 wood screws into the four pilot holes. Tighten  
each screw into the mounting surface until just less than  
1/4" of the screw head protrudes.  
Align the mounting screws with the slots in the brackets  
and place the interface against the surface, with the  
screws through the bracket slots.  
Slide the unit slightly forward or back, then tighten all  
four screws to secure it in place.  
Figure 2-4 — Projector mounting for the MPA 122  
MPA 122 • Installation and Operation  
2-4  
MPA 122 • Installation and Operation  
2-5  
 
Installation and operation, cont’d  
Power input  
On the side mounting plates, devices are typically  
mounted on the outside of the bracket. On the front  
mounting plate, devices are typically mounted on the  
inside of the bracket.  
Power connection — Plug the external 12 VDC power  
supply into this connector. The power supply is included  
with the unit.  
1
To verify the polarity before connection, plug in the power  
supply with no load and check the output with a voltmeter.  
The front mounting plate is 1/4" taller than the side  
plates. This size helps ensure the accessibility of buttons  
or connectors.  
When connecting the power supply, voltage polarity  
is extremely important. Applying power with  
incorrect voltage polarity could damage the power  
supply and the interface. Identify the power cord  
negative lead by the ridges on the side of the cord.  
CAUTION  
3.  
4.  
Affix the black rubber pad to the mounting plate.  
Place the U-bolt around the ceiling pole and insert the two  
legs of the U-bolt through the slotted holes on the  
bracket’s mounting plate and then through the slotted  
holes on the backing brace.  
Smooth  
Ridges  
For a typical (1.5" to 2.0" diameter) pole — The supplied  
U-bolt fits a typical ceiling pole.  
A
A
SECTION A–A  
For a smaller or larger pole — Locally obtain a U-bolt that  
fits the ceiling pole. The slotted holes on the bracket will  
accommodate a U-bolt for pole sizes from 1.0" to 2.5" in  
diameter.  
0.2” (5 mm) MAX  
Power Supply  
Output Cord  
Captive Screw  
Connector  
5.  
Secure the bracket to the U-bolt with the included hex  
nuts, washers, and lock washers.  
Figure 2-6 — Power connector wiring  
Do not tin the stripped power supply leads before  
Rear Panel Features  
installing the captive screw connector. Tinned wires are  
not as secure in the captive screw connectors and could  
pull out.  
MPA 122  
OUTPUTS  
4/8 Ohms  
INPUTS  
C
US  
The two power cord wires must be kept separate  
while the power supply is plugged in. Remove  
power before continuing.  
L
POWER  
REMOTE  
R
12V  
3A MAX  
10V  
VOL/MUTE  
L
L
R
R
Audio inputs  
There are three choices of input connectors (RCA, 3.5 mm  
stereo, and captive screw) available on the rear panel for  
adapter-free connections.  
1
2
3
4
5
6
Figure 2-5 — MPA 122 back panel  
Connecting more than one input signal at one time will result in  
audio mixing.  
RCA input connector — Plug an RCA audio source to this line  
level input.  
2
3
3.5 mm stereo input — Plug a 3.5 mm audio micro cable into  
this stereo jack.  
MPA 122 • Installation and Operation  
2-6  
MPA 122 • Installation and Operation  
2-7  
 
Installation and operation, cont’d  
Balanced or unbalanced audio input connector — Marked “L”  
and “R”, this 3.5 mm captive screw input is for bare wire,  
balanced or unbalanced audio signals.  
Power LED — A green LED lights to indicate that the unit is  
receiving power.  
4
1
2
DIP switches — This 2-bank DIP switch controls the limiter (on  
and off) on one side, and allows for setting the Stereo and Dual  
Mono modes on the other.  
Tip  
Ring  
Tip  
Sleeve (s)  
Tip  
Sleeve  
Tip  
Ring  
1 — Limiter — When the limiter is switched to on, the MPA will  
automatically reduce the level to prevent the amplifier  
from clipping.  
Balanced Input  
Unbalanced Input  
Figure 2-7 — 3.5 mm captive screw audio input  
connector wiring  
2 — Stereo/Dual Mono:  
Stereo mode — In stereo mode, the audio signal input from  
each channel will be output to the speakers respectively.  
Remote control  
Dual Mono mode — In dual mono mode, the inputs from  
channels L and R will be summed together and output to  
the speakers as two mono channels. In essence, output L  
and R contain the same combined signal information.  
Remote input connector — An optional 3-pin captive screw  
5
connector that allows a wall mounted audio controller or  
MediaLink product to remotely control volume and mute levels  
for the MPA 122 unit.  
3
Potentiometer adjustments — These three potentiometers  
optimize level, bass, and treble adjustments.  
For more information on using the remote input connector, see  
Chapter 3, Remote Operation.  
Setting Up the MPA 122 Amplifier  
Audio output  
The following steps ensure optimal sound by adjusting the  
projector volume to match the level, bass, and treble of the  
MPA 122 amplifier.  
Speaker connector — Marked “L” and “R”, this 4-pin, 5 mm  
captive screw connector is used to connect the amplifier to the  
speakers.  
6
When setting up volume control, ensure that the projector  
output is set to variable out. Consult the projector’s user  
manual for detailed instructions on its calibration.  
The recommended MPA 122 output set-up includes 4  
ceiling speakers of 8 ohm impedance, (2 sets in parallel  
with each other), so that each output drives a maximum  
of 4 ohm loads.  
To adjust the MPA 122 input level, bass, and treble, do the  
following:  
Do not tie both L and R outputs to each other and/  
or to input ground. Doing so will short out the  
outputs and damage the amplifier.  
1.  
If connecting to a projector, ensure that the volume on the  
device is at its lowest point, then adjust the level of the  
MPA 122 fully counterclockwise.  
2.  
3.  
Set the projector volume to its maximum volume level.  
No sound should come out.  
Front Panel Features  
Return to the MPA and raise the level until sound  
distortion occurs, then lower the level slightly until any  
distortion disappears. This setting ensures that, whatever  
the projector volume setting may be, no clipping occurs.  
LEVEL  
BASS  
TREBLE  
ON  
STEREO  
LIMITER  
1
DUAL  
4.  
Adjust bass and treble to preference.  
MPA 122  
OFF  
MONO  
MINI POWER AMPLIFIER  
2
3
Figure 2-8 — MPA 122 front panel  
MPA 122 • Installation and Operation  
2-8  
MPA 122 • Installation and Operation  
2-9  
 
Installation and operation, cont’d  
Remote connector wiring  
MPA 122  
As shown below, Pin 1 is 10 VDC reference voltage. Pin 2 is  
volume control DC voltage; range is 0 to 10 V, where 0 V is mute  
and 10 V provides maximum volume. Pin 3 is ground.  
All nominal levels are at 10%  
REMOTE  
1
2
3
10V  
VOL/MUTE  
1
2
MAX  
10K  
MIN  
MUTE  
2K  
VOLUME  
3
GND  
Figure 2-9 — Pinout diagram for optional remote  
connector  
Chapter Three  
See Chapter 3, Remote Operation for more information on the  
three options (IR remote, MLC series, or DC volume/mute  
controller) for remote control.  
3
Remote Operation  
Remote Control Options  
MPA 122 • Installation and Operation  
2-10  
 
Remote Operation  
Remote Control Options  
MPA 122  
8 ohm Ceiling  
Speakers  
in Parallel  
PC  
DVD  
VGA w/  
S-video  
Audio Cable  
Audio RCA  
2
2
1
A
P
S
T
M
U
P
T
U
O
4/8 Ohms  
S
U
C
TE  
R
O
S
T
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V
U
R
P
L
IN  
TE  
U
10  
/M  
L
VO  
R
L
L
R
E
W
O
P
Extron  
MPA 122  
Mini Power Amplifier  
R
VCR  
Composite  
Audio RCA  
Variable  
Audio  
Output  
1
R
O
T
2
C
E
OJ  
PR  
FF  
O
3
4
ON  
E
ComLink  
UM  
OL  
V
IG  
F
N
O
C
104 IP  
LC  
M
TE  
U
M
P
E  
L
VO  
VCM 100 AA  
2
Extron  
MLC 104 IP  
Controller  
Extron  
Projector  
3
VCM 100 AAP  
Volume/Mute Controller  
1
Remote Control Options  
IR Remote  
Appendix A  
IR Remote - (input selection and volume control through projector)  
VCM 100 Volume/Mute Controller - (direct MPA 122 control)  
1
2
3
MLC 104 IP Controller - (input selection and volume control through projector)  
A
Figure 3-1 — Three remote control options  
Using the projector’s IR remote — For a projector with variable  
audio outputs, use the projector’s IR remote to control the  
projector’s volume, which effectively controls the MPA’s  
volume.  
1
2
3
Specifications, Part Numbers,  
and Accessories  
Extron VCM 100 or mute controller — For a projector without  
variable audio outputs, or for a system designed to control MPA  
volume directly, use a 10k ohm potentiometer to control the  
MPA directly via the remote port on the MPA.  
Specifications  
Included Parts  
Using a MediaLink™ Controller — For a projector with  
variable audio output, use a MediaLink controller to control the  
projector’s volume via RS-232 or the projector’s IR remote to  
effectively control the MPA volume.  
Optional Accessories  
MPA 122 • Remote Operation  
3-2  
 
Specifications, Part Numbers, and Accessories  
Audio  
Audio output  
Frequency response..................... 20 Hz to 20 kHz, 1 dB @ 1 watt output  
THD + Noise ................................ 0.15% @ 1 kHz at nominal level (1 watt,  
8 ohm load)  
Number/signal type ................... 1 stereo or 2 mono (2 channels total)  
Connectors .................................... (1) 5 mm captive screw connector, 4 pole  
Minimum load impedance ......... 4 ohms  
S/N ................................................ >72 dB @ 20 Hz to 20 kHz at maximum  
output (unweighted)  
Stereo channel separation .......... >55 dB @ 1 kHz, >45 dB @ 20 kHz  
CMRR ............................................ >80 dB @ 1 kHz, >70 dB @ 20 kHz  
Bass adjustment ........................... 10 dB @ 80 Hz (reference) to 1 kHz (2 dB  
tolerance)  
Amplifier type .............................. Improved Class D  
Continuous power with a full load and 1% THD  
At 4 ohms .......................... 11 watts (rms) per channel  
At 8 ohms .......................... 7 watts (rms) per channel  
Damping factor ............................ >30 (with a 4 ohm load)  
Treble adjustment ........................ 10 dB @ 10 kHz (reference) to 1 kHz (2  
dB tolerance)  
Control/remote — amplifier  
Control port .................................. (1) 3.5 mm captive screw connector, 3 pole  
Pin configuration ........................... Pin 1 = 10 V, pin 2 = variable voltage or  
mute, pin 3 = GND  
Audio input  
Number/signal type ................... 1 stereo, balanced/unbalanced input  
2 stereo, unbalanced inputs  
General  
(The three inputs are individually  
buffered and mixed together.)  
External power supply ............... 100 VAC to 240 VAC, 50/60 Hz, external,  
autoswitchable; to 12 VDC, 3 A (max.),  
regulated  
Power input requirements ......... 12 VDC, up to 3 A  
Temperature/humidity .............. Storage: -40 to +158 °F (-40 to +70 °C) /  
10% to 90%, noncondensing  
Connectors .................................... (1) 3.5 mm captive screw connector, 5 pole  
(main input)  
(1) 3.5 mm mini audio jack (tip, ring,  
sleeve)  
1 pair RCA  
Operating: +32 to +122 °F (0 to +50 °C) /  
10% to 90%, noncondensing  
Impedance .................................... >18k ohms unbalanced, >24k ohms  
balanced, DC coupled  
Rack mount................................... Yes, with optional 1U rack shelf, part #60-  
190-01 or 60-604-01; or VersaTools® rack  
shelf, part #60-190-20 or 60-604-20. Above-  
projector mountable with optional Multi-  
Product Projector Mounting Kit #70-374-  
01. Also furniture mountable with  
Nominal level ............................... +4 dBu (1.23 Vrms) balanced or -10 dBV  
(316 mVrms) unbalanced  
Maximum level  
Level pot. at 12 o’clock.... +6 dBV (unbalanced), +16 dBu (balanced)  
at 1% THD+N  
Level pot. at 9 o’clock...... +16 dBV (unbalanced), +23 dBu (balanced)  
at 1% THD+N  
optional Mini Under-Desk Mounting Kit,  
#70-212-01.  
Input level sensitivity ................. -10 dBV (316 mV) from unbalanced input  
for maximum output (11 watts with a  
Enclosure type.............................. Metal  
Enclosure dimensions ................. 1.7" H x 4.3" W x 3.0" D (1U high, quarter  
rack wide)  
4 ohm load and level set to maximum)  
before clipping  
4.3 cm H x 10.9 cm W x 7.6 cm D  
(Depth excludes connectors.)  
Product weight............................. 0.6 lbs (0.3 kg)  
Shipping weight........................... 3 lbs (2 kg)  
0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV 2 dBu  
Vibration ....................................... ISTA 1A in carton (International Safe  
Transit Association)  
MPA 122 • Specifications, Part Numbers, and Accessories  
A-2  
MPA 122 • Specifications, Part Numbers, and Accessories  
A-3  
 
Specifications, Part Numbers, and Accessories  
Listings .......................................... UL, CUL  
Compliances ................................. CE, FCC Class A, VCCI, AS/NZS, ICES  
MTBF ............................................. 30,000 hours  
Included Parts  
These items are included in each order of a MPA 122 unit:  
Warranty ....................................... 3 years parts and labor  
Included parts  
Part number  
All nominal levels are at 10%  
MPA 122 Mini Power Amplifier  
60-668-01  
70-380-01  
10-319-10  
12 VDC, 3 A external power supply  
Female, 3.5 mm, 5-pole captive screw conn.  
Specifications are subject to change without notice.  
Female, 3.5 mm, 3-pole captive screw conn. 10-319-03  
MPA 122 Mini Power Amplifier User’s Manual  
4-pin, 5 mm terminal block plug  
Black rubber pad  
10-163-14  
IEC power cord  
Industrial strength Velcro®  
Optional Accessories  
Accessories  
Part number  
VersaTools® multi-product projector mounting kit  
70-374-01  
1U universal VersaTools rack shelf  
1U basic VersaTools rack shelf  
1U universal rack shelf  
60-190-20  
60-604-20  
60-190-01  
60-190-10  
60-604-01  
60-604-10  
70-212-01  
1U 6" deep universal rack shelf kit  
1U basic rack shelf  
1U 6" deep basic rack shelf  
Mini under-desk mounting bracket kit  
MPA 122 • Specifications, Part Numbers, and Accessories  
A-4  
MPA 122 • Specifications, Part Numbers, and Accessories  
A-5  
 
Specifications, Part Numbers, Accessories, cont’d  
MPA 122 • Specifications, Part Numbers, and Accessories  
A-6  
 

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