User’s Manual
MPA 181T
Mini Power Amplifier
Extron Electronics, USA
1230 South Lewis Street
Anaheim, CA 92805
USA
714.491.1500
Fax 714.491.1517
Extron Electronics, Europe
Beeldschermweg 6C
3821 AH Amersfoort
The Netherlands
+31.33.453.4040
Fax +31.33.453.4050
Extron Electronics, Asia
135 Joo Seng Road, #04-01
PM Industrial Building
Singapore 368363
+65.6383.4400
Fax +65.6383.4664
Extron Electronics, Japan
Kyodo Building
16 Ichibancho
Chiyoda-ku, Tokyo 102-0082 Japan
+81.3.3511.7655
Fax +81.3.3511.7656
68-1082-01
Rev. A
02 06
© 2006 Extron Electronics. All rights reserved.
Quick Start Guide — MPA 181T
To install and set up an MPA 181T 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 181T on a rack, under a desk, or on a projector, as
illustrated below.
Step 3
Attach the speakers to the MPA 181T.
Extron
MPA 181
Rear Plate Mini Power
Amplifier
Rubber Pad
Extron
PMK 350
Cable Access
Above Projector
Mount Bracket
LIM
ITE
ON
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LE
VE
L
B
A
SS
TR
EB
LE
MI
NI
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PO
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W
A
ER
1
AM 81
ER
PL
IFI
T
Extron
Power Supply
for MPA 181
Front Plate
Drill pilot holes —
3/32” (2.4mm) dia.
1/4” (6.3 mm) deep
#8 Wood Screws (2 Plcs)
Each Side
Cover Sheet
Cable Access
Extron PMP
6”, 10“ or 12”
Projector Mount
Pole
Extron
UPB 25
Universal Projector
Mounting Bracket
E
L
B
E
R
T
S
T
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S
1
A
8
B
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OW
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Under Desk
Machine Screw (2 Plcs)
Each Side
Projector Mount
Projector
L
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IT
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IN
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A
A
6" Deep Rack Shelf
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181T
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Rack Mount
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B
(2) 4-40 x 3/16" screws
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IF
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Step 4
Attach inputs to the MPA 181T 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 results in audio mixing.
MPA 181T • Quick Start Guide QS-1
Table of Contents
Quick Start Guide — MPA 181T, cont’d
Chapter 1 • Introduction .......................................................... 1-1
About this Manual ................................................................ 1-2
About the MPA 181T ............................................................ 1-2
Features ...................................................................................... 1-2
Step 5
Connect power cords to the MPA 181T and other audio equipment.
Step 6
Adjust the MPA 181T input level, bass and
treble.
LEVEL
BASS
TREBLE
Chapter 2 • Installation and Operation ......................... 2-1
Installation Overview.......................................................... 2-2
a.
If connecting to a projector,
ensure that the volume on the
projector is at its lowest point,
then adjust the level of the
MPA 181T
MINI POWER AMPLIFIER
Mounting the MPA 181T .................................................... 2-2
Rack mounting....................................................................... 2-3
Under-desk mounting ........................................................... 2-4
Projector mounting ............................................................... 2-5
MPA 181T fully counterclockwise.
b.
c.
Set the projector volume to its maximum volume level
(no sound should come out).
Rear Panel Features.............................................................. 2-7
Power input ........................................................................... 2-7
Audio inputs .......................................................................... 2-8
Remote control ...................................................................... 2-9
Audio output ......................................................................... 2-9
Return to the MPA 181T 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.
Front Panel Features .......................................................... 2-10
Setting Up the MPA 181T Amplifier........................... 2-10
Remote connector wiring ................................................... 2-11
Extron
SI 26CT
Two-way Ceiling
PC
DVD
S-video
Audio RCA
Chapter 3 • Remote Operation ............................................ 3-1
Remote Control Options .................................................... 3-2
Speakers
or
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Appendix A • Specifications, Part Numbers,
and Accessories.............................................................................. A-1
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Extron
SI 26
Surface-mount
Speakers
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2
3
VCR
1
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Specifications ......................................................................... A-2
Included Parts......................................................................... A-5
Optional Accessories........................................................... A-5
Composite
Audio RCA
Extron
MPA 181T
Variable
Audio
Mini Power Amplifier
Output
R
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RS-232
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0
0
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1
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2
Extron
MLC 104 IP
Controller
Extron
3
Projector
VCM 100 AAP
Volume/Mute Controller in
1
IR Remote AAP 100 Mounting Frame
Remote Control Options
IR Remote - (input selection and volume control through projector)
VCM 100 Volume/Mute Controller - (direct MPA 161T control)
1
2
3
All trademarks mentioned in this manual are the properties of their respective owners.
68-1082-01
Rev. A
MLC 104 IP Controller - (input selection and volume control through projector)
02 06
MPA 181T • Quick Start Guide
QS-2
MPA 181T • Table of Contents
i
Table of Contents, cont’d
MPA 181T
Chapter One
1
Introduction
About this Manual
About the MPA 181T
Features
ii MPA 181T • Table of Contents
MPA 181T • Introduction
Introduction
Volume and mute remote control — A rear panel, captive screw
“Remote” input connector allows for remote control of
volume adjustment and muting.
About this Manual
This manual contains information about the Extron MPA 181T
Mini Power Amplifier with instructions on how to mount and
operate the unit.
Flexible mounting options — The MPA 181T can be mounted
on a rack, projector, or under furniture.
About the MPA 181T
External international power supply — The included
autoswitchable, 12 VDC, 3 A external power supply
provides worldwide power compatibility
(part #70-380-01).
The Extron MPA 181T is a high performance, compact, single
channel power amplifier. The MPA 181T delivers 18 watts (rms)
for 70 Volt line level speakers, 14 watts (rms) for 4 ohm speaker
loads, and 8 watts (rms) for 8 ohm loads.
The MPA 181T accepts balanced and unbalanced stereo and
mono inputs, and outputs a mono audio signal to drive for
4/8 ohm direct speakers or 70 volt line distribution speakers.
Front panel controls are provided for input level, bass, and
treble. The front panel also features a limiter switch which
automatically reduces the gain to prevent distortion (amplifier
clipping). The MPA 181T features remote control capability for
volume adjustment and muting. The MPA 181T, housed in a
1U, quarter rack width metal enclosure, can be mounted under
a desk, or mounted on a projector.
Features
Class D audio amplifier — The MPA 181T features improved,
class D technology for high efficiency and low distortion.
Compact size — The MPA 181T is housed in a 1U high, 1/4 rack
width, 6" deep, metal enclosure, allowing this amplifier to
fit in many unique applications.
Three balanced and unbalanced audio inputs — Balanced or
unbalanced input are available on the captive screw
connector, while the 3.5 mm stereo mini jack and RCA
connectors provide unbalanced input. The captive screw,
RCA and stereo mini jack connectors are actively mixed
together, then summed into a mono signal.
Selectable 70V or direct 4/8 ohm output — Fits distribution
sound or direct 4/8 ohm applications.
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.
1-3
MPA 181T • Introduction
1-2
MPA 181T • Introduction
Introduction
MPA 181T
Chapter Two
2
Installation and Operation
Installation Overview
Mounting the MPA 181T
Rear Panel Features
Front Panel Features
Setting up the MPA 181T Amplifier
MPA 181T • Introduction
1-4
Installation and Operation
Following are detailed instructions on rack mounting, under-
desk mounting, and projector mounting the MPA 181T unit (for
use in classrooms, personal offices, meeting rooms, etc.).
Installation Overview
To install and set up an MPA 181T, follow these steps:
Turn all of the equipment off. Make sure that the input
devices (DVD, VCR, PC, etc.), the MPA 181T unit, and the
output devices are turned off and disconnected from their
power source(s).
1
Rack mounting
1.
If feet were previously installed on the bottom of the
MPA 181T unit, remove them.
Mount the MPA 181T unit. See Mounting the MPA 181T
below.
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. See figure 2-1 below.
2
3
Attach the speakers and/or other output devices to the
MPA 181T. See Rear Panel Features later in this chapter for
more information.
3.
Install blank panel(s) or other unit(s) to the rack shelf.
4.
Insert the shelf into the rack, aligning the holes in the shelf
with those in the rack.
Attach inputs to the MPA 181T. See “Audio inputs” later
in this chapter for more information.
4
5.
Secure the shelf to the rack using the supplied machine
screws.
Connect power cords to the MPA 181T and other devices.
5
6
Adjust MPA 181T input level, bass and treble. See Setting
up the MPA Amplifier later in this chapter for detailed
information.
LIM
O
ITER
N
Mounting the MPA 181T
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6" Deep Rack Shelf
A
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IF
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There are many optional accessories for mounting the
MPA 181T. They include the following part numbers:
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LIM
ITER
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F
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•
•
•
PMK 300 Multi-Product Projector Mounting Kit
(70-374-01)
B
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1
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IF
PMK 350 Low Profile Multi-product Projector Mount Kit
(70-563-02, -03)
RSU 126 1U 6” Universal Rack Shelf
(60-190-10)
LI
MITE
R
O
N
O
F
L
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F
V
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B
(2) 4-40 x 3/16" screws
A
S
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T
R
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B
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•
•
•
RSU 129 1U Universal rack shelf
RSB 129 1U 6” basic rack shelf
(60-190-01)
(60-604-01)
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A
1
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8
IF
A
1
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Figure 2-1 — Rack mounting the MPA 181T
MBU 125 1U Under-Desk Mounting Kit
(70-077-01)
(70-077-02)
• MBD 129 1U Through-Desk Mounting Kit
MPA 181T • Installation and Operation
MPA 181T • Installation and Operation
2-2
2-3
Installation and operation, cont’d
6" Deep Rack Shelf
#8 Wood Screw (2 Plcs)
Each Side
Drill pilot holes —
3/32” (2.4 mm) dia.
1/4” (6.3 mm) deep
L
IM
O
IT
N
E
R
O
1/4 Rack Width False Front
Face Plate
F
F
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B
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F
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Machine Screw (2 Plcs)
Each Side
Figure 2-3 — Under-desk mounting
L
IM
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O
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R
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F
L
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F
V
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B
(2) 4-40 x 3/16" screws
A
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B
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R
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Projector mounting
Figure 2-2 — Mounting the MPA 181T on the
RSU shelf
In addition to mounting the MPA 181T unit to a rack or under
furniture, it can also be projector mounted using the optional
kits PMK 350 (part #70-563-02, -03) or PMK 300 (part #70-374-
01). See figures 2-4 and 2-5 on the following page.
Under-desk mounting
In addition to using the MPA 181T 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 (part #70-077-01) for
furniture, as follows:
To projector mount the MPA 181T, do the following:
1.
If necessary, remove the feet from the bottom of the device
to be installed.
2.
Mount the MPA 181T to one of the bracket’s three
mounting plates. The device can be horizontally mounted
facing either up or down, whichever is most convenient.
See the illustrations on the following page.
1.
Attach the mounting brackets to the amplifier with the
machine screws provided (figure 2-3).
2.
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.
3.
4.
5.
6.
Drill 3/32" (2 mm) diameter pilot holes, 1/4" (6.3 mm)
deep in the mounting surface at the marked screw
locations.
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.
MPA 181T • Installation and Operation
2-4
MPA 181T • Installation and Operation
2-5
Installation and operation, cont’d
6.
Secure the bracket to the U-bolt onto the ceiling pole with
the included hex nuts, washers, and lock washers.
Rear Plate
Extron
MPA 181T
Mini Power
Amplifier
Rubber Pad
Extron
Clamping
Plate
PMK 350
Above Projector
Mount Bracket
Extron
Cable Access
MPA 181T
L
IM
IT
ON
OF
E
R
LE
F
VEL
BA
M
S
Mini Power
Amplifier
S
TREB
Rubber Pad
LE
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PO
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W
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1
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81
P
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LI
FIER
U-Bolt
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Front Plate
T
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for MPA 181T
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3
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Cover Sheet
Extron
PMK 300
Multi Product Projector
Mount Kit
Cable Access
Extron
PMP
6”, 10“ or 12”
Projector Mount
Pole
Extron
UPB 25
Universal Projector
Mounting Bracket
Figure 2-5 — Mounting the PMK 300
Rear Panel Features
5
REMOTE
MPA 181T
INPUTS
LISTED
1T23
US
C
I.T.E.
(MONO)
10V
VOL/MUTE
OUTPUTS
L
COM 70V
POWER
70V
(MONO)
R
L
Projector
4/8 Ohms
R
12V
3A MAX
Figure 2-4 — Using the PMK 350 projector
mounting kit for the MPA 181T
1
2
3
4
6
7
Figure 2-5 — MPA 181T back panel
3.
4.
Affix the black rubber pad to the mounting plate.
Power input
Place the U-bolt behind, then through the two holes of the
mounting plate to wrap around the ceiling pole.
Power connection — Plug the external 12 VDC power
supply into this connector. The power supply is included
with the unit.
1
For a typical (1.5" to 2.0" diameter) pole — The supplied
U-bolt fits a typical ceiling pole.
5.
Place the bracket on the opposing side of the ceiling pole
and through the U-bolt legs.
MPA 181T • Installation and Operation
2-6
MPA 181T • Installation and Operation
2-7
Installation and operation, cont’d
To verify the polarity before connection, plug in the power
supply with no load and check the output with a voltmeter.
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.
4
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
Unbalanced Output
Balanced Output
Tip
See Caution
Sleeve (s)
Tip
See Caution
Tip
Ring
Sleeve (s)
Tip
Ring
Figure 2-7 — 3.5 mm captive screw audio input
connector wiring
Smooth
Ridges
Connect the sleeves to ground (Gnd). Connecting
the sleeve to a negative (-) terminal will damage the
audio output circuits.
CAUTION
A
A
SECTION A–A
0.2” (5 mm) MAX
Power Supply
Output Cord
Remote control
Remote input connector — An optional 5-pin, captive screw
connector that allows a wall mounted audio controller or
MediaLink product to remotely control volume and mute levels
for the MPA 181T unit.
Captive Screw
Connector
5
Figure 2-6 — Power connector wiring
Do not tin the stripped power supply leads before
installing the captive screw connector. Tinned wires are
not as secure in the captive screw connectors and could
pull out.
For more information on using the remote input connector, see
Chapter 3, Remote Operation.
Output impedance toggle switch — A switch to toggle between
6
a 70 volt or 4/8 ohm output.
The two power cord wires must be kept separate
while the power supply is plugged in. Remove
power before continuing.
Audio output
Speaker connector — This 4-pin, 5 mm captive screw connector
is used to connect the amplifier to the speakers.
7
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.
Extron
SI 3CT LP
70V/100V/8 ohm
Ceiling Speakers
All inputs are actively mixed together then summed into a
mono signal.
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RCA input connector — Plug an RCA audio source to this line
level input.
V
2
3
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2
3
1
M
3.5 mm stereo input — Plug a 3.5 mm audio micro cable into
Extron
MPA 181T
Mini Power
this stereo jack.
Amplifier (70V)
Figure 2-8 — Typical speaker connection
MPA 181T • Installation and Operation
2-8
MPA 181T • Installation and Operation
2-9
Installation and operation, cont’d
4/8 ohm output 70 volt output
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 181T fully counterclockwise.
COM 70V
COM 70V
70V
70V
4/8 OHM
4/8 OHM
+
-
+
-
2.
3.
Set the projector volume to its maximum volume level.
No sound should come out.
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.
COM 70V
Figure 2-9 — Output speaker wiring
The 70 volt output and the 4/8 ohm output cannot
be used simultaneously.
4.
Adjust bass and treble to preference.
Remote connector wiring
Front Panel Features
Options for remote control include the Extron VCM 100 and
VC 50 volume controllers. Third party 10k potentiometer
volume controllers can also be connected to this port.
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.
ON
LEVEL
BASS
TREBLE
LIMITER
1
OFF
MPA 181T
MINI POWER AMPLIFIER
All nominal levels are at 10%.
Red
Extron
Black
Ground
3
2
STP 22
Cable
REMOTE
Figure 2-10— MPA 181T front panel
1
2
3
10V
VOL/MUTE
Power LED — A green LED lights to indicate that the unit is
receiving power.
1
2
Limiter toggle switch — When the limiter is switched to “On”,
the MPA will automatically reduce the level to prevent the
amplifier from clipping.
3
Potentiometer adjustments — These three potentiometers
optimize level, bass, and treble adjustments.
VOLUME
MUTE
Setting Up the MPA 181T Amplifier
When setting up volume control, ensure that the projector
output is set to variable out. Consult the projector’s user
VCM 100
manual for detailed instructions on its calibration.
Figure 2-11— Pinout diagram for VCM 100 MAAP
remote connector
To adjust the MPA 181T input level, bass, and treble, do the
following:
2-11
MPA 181T • Installation and Operation
2-10
MPA 181T • Installation and Operation
Installation and operation, cont’d
1
MAX
MPA 181T
2K
2
10K
MIN
3
GND
Figure 2-12 — Pinout diagram for a third party
volume potentiometer
See Chapter 3, Remote Operation for more information on the
three options (IR remote, MLC series, or DC volume/mute
controller) for remote control.
Chapter Three
3
Remote Operation
Remote Control Options
MPA 181T • Installation and Operation
2-12
Remote Operation
Remote Control Options
MPA 181T
Extron
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Two-way Ceiling
Speakers
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DVD
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Surface-mount
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Composite
Extron
MPA 181T
Mini Power Amplifier
Audio RCA
Variable
Audio
Output
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Appendix A
2
Extron
Extron
VCM 100 AAP
Volume/Mute Controller in
MLC 104 IP
Controller
3
Projector
A
1
IR Remote AAP 100 Mounting Frame
Remote Control Options
IR Remote - (input selection and volume control through projector)
VCM 100 Volume/Mute Controller - (direct MPA 161T control)
1
2
3
MLC 104 IP Controller - (input selection and volume control through projector)
Specifications, Part Numbers,
and Accessories
Figure 3-1 — Three remote control options
Using the projector’s IR remote — For a projector with variable
1
audio outputs, use the projector’s IR remote to control the
projector’s volume, which effectively controls the MPA’s
volume.
Specifications
Included Parts
Extron VCM 100 and mute controller — For a projector without
2
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.
Optional Accessories
Using a MediaLink™ Controller — For a projector with
3
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.
MPA 181T • Remote Operation
3-2
Specifications, Part Numbers, and Accessories
Input level sensitivity ................. -16 dBV (158 mV) from unbalanced input
for maximum output (18 watts at 70 V
Specifications
output and with the level set to
maximum) before clipping
Audio
Frequency response
0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV 2 dBu
8 ohm direct output......... 20 Hz to 20 kHz, 1.5 dB
70 V output ....................... 110 Hz to 20 kHz, +0.5/-3 dB
Audio output
Number/signal type ................... 1 single channel (mono) 70 V output or
1 direct 4 or 8 ohm speaker output
Connectors .................................... (1) 5 mm captive screw connector, 4 pole
Minimum load impedance ......... 2 ohms
THD + Noise ................................ 0.1% @ 1 kHz at nominal level
(1 watt, 8 ohm load, or 70 V output)
S/N ................................................ >72 dB @ 20 Hz to 20 kHz at maximum
output (unweighted)
CMRR ............................................ >80 dB @ 1 kHz, >70 dB @ 20 kHz
Bass adjustment ........................... 10 dB @ 100 Hz (reference) to 1 kHz
(2 dB tolerance)
Treble adjustment ........................ 10 dB @ 10 kHz (reference) to 1 kHz
(2 dB tolerance)
Amplifier type .............................. Improved Class D
Continuous power with a full load and 1% THD
70 V system ....................... 18 watts (rms)
At 4 ohms .......................... 14 watts (rms)
At 8 ohms .......................... 8 watts (rms)
Damping factor ............................ >30 (with a 4 ohm load)
Audio input
Number/signal type ................... 1 stereo/mono, balanced/
unbalanced input
Control/remote — amplifier
Control port .................................. (1) 3.5 mm captive screw connector, 5 pole
Pin configuration ......................... Pin 1 = 10 V, pin 2 = volume/mute control
voltage, pin 3 = GND
2 stereo/mono, unbalanced inputs
(The three inputs are individually
buffered and mixed together. Stereo
signals are actively summed into a mono
signal)
General
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
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
Impedance .................................... 18k ohms unbalanced, 23k ohms
balanced, DC coupled
Nominal level
Operating: +32 to +122 °F (0 to +50 °C) /
10% to 90%, noncondensing
RCA and mini jack .......... -10 dBV (316mVrms) (unbalanced)
Captive screw ................... +4 dBu, (1.23mVrms) (balanced)
Rack mount ................................... Yes, with optional 1U rack shelf, part #60-
190-10 or 60-604-10. Also furniture
mountable with optional Mini Under-
Desk Mounting Kit, #70-077-10 or
mountable to a projector mount with
optional kits PMK 350 (#70-563-02, -03) or
PMK 300 (#70-374-01).
Maximum level
Level pot. at 11 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
Enclosure type .............................. Metal
MPA 181T • Specifications, Part Numbers, and Accessories
A-2
MPA 181T • Specifications, Part Numbers, and Accessories
A-3
Specifications, Part Numbers, and Accessories
Enclosure dimensions ................. 1.7" H x 4.3" W x 6.0" D (1U high, quarter
rack wide)
Included Parts
These items are included in each order of a MPA 181T unit:
4.3 cm H x 10.9 cm W x 15.2 cm D
(Depth excludes connectors.)
Product weight............................. 1.2 lbs (0.5 kg)
Shipping weight........................... 6 lbs (3 kg)
Vibration ....................................... ISTA 1A in carton (International Safe
Transit Association)
Included parts
Part number
MPA 181T Mini Power Amplifier
12 VDC, 3 A external power supply
(2) 5-pin, 3.5 mm captive screw conn.
2-pin, 3.5 mm captive screw conn.
4-pin, 5 mm terminal block plug
60-747-01
70-380-01
10-319-10
10-319-03
10-163-14
MPA 181T Mini Power Amplifier User’s Manual
IEC power cord
Tweeker
Optional Accessories
Accessories
Part number
PMK 300 Multi-Product Proj Mount Kit
70-374-01
PMK 350 Low Profile Multi-product Proj Mount Kit
70-563-02, -03
RSU 126 1U 6” Universal Rack Shelf
RSU 129 1U Universal rack shelf
60-190-10
60-190-01
60-604-01
70-077-01
70-077-02
RSB 129 1U 6” basic rack shelf
MBU 125 1U Under-Desk Mounting Kit
MBD 129 1U Through-Desk Mounting Kit
VCM 100 AAP volume and mute control
70-396-11,
-21, -51
VCM 100 MAAP volume and mute control
70-397-11,
-21, -51
MPA 181T • Specifications, Part Numbers, and Accessories
A-4
MPA 181T • Specifications, Part Numbers, and Accessories
A-5
Specifications, Part Numbers, Accessories, cont’d
MPA 181T • Specifications, Part Numbers, and Accessories
A-6
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