Extron electronic Car Amplifier MPA 401 70V User Manual

MPA 401-70V  
Mini Power Amplifier  
68-1436-01  
Rev. A  
01 10  
 
FCC Class B Notice  
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed  
to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy  
and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee  
that the interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be  
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:  
• Reorient or relocate the receiving antenna.  
• Increase the separation between the equipment and receiver.  
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  
• Consult the dealer or an experienced radio/TV technician for help.  
This unit was tested with shielded cables on the peripheral devices. Shielded cables must be used with the unit to ensure compliance with FCC emissions limits.  
N
For complete safety information about these products please read the Safety Compliances sheet, which is available online at www.extron.com  
N
 
Important Safety Instructions  
1)  
2)  
3)  
4)  
5)  
6)  
7)  
Read these instructions.  
Keep these instructions.  
Heed all warnings.  
Follow all instructions.  
Do not use this apparatus near water.  
Clean only with dry cloth.  
Do not block any ventilation openings. Install in accordance with the  
manufacturer’s instructions.  
8)  
9)  
Do not install near any heat sources such as radiators, heat registers, stoves, or  
other apparatus (including amplifiers) that produce heat.  
Do not defeat the safety purpose of the polarized or grounding-type plug. A  
polarized plug has two blades with one wider than the other. A grounding  
type plug has two blades and a third grounding prong. The wide blade or the  
third prong are provided for your safety. If the provided plug does not fit into  
your outlet, consult an electrician for replacement of the obsolete outlet.  
10) Protect the power cord from being walked on or pinched particularly at plugs,  
convenience receptacles, and the point where they exit from the apparatus.  
11) Only use attachments/accessories specified by the manufacturer.  
12)  
Use only with the cart, stand, tripod, bracket, or table specified by  
the manufacturer, or sold with the apparatus. When a cart is used,  
use caution when moving the cart/apparatus combination to avoid  
injury from tip-over.  
13) Unplug this apparatus during lightning storms or when unused for long  
periods of time.  
14) Refer all servicing to qualified service personnel. Servicing is required when  
the apparatus has been damaged in any way, such as power-supply cord  
or plug is damaged, liquid has been spilled or objects have fallen into the  
apparatus, the apparatus has been exposed to rain or moisture, does not  
operate normally, or has been dropped.  
 
Table of Contents  
Chapter One • Introduction........................................................................................................1-1  
About this Manual......................................................................................................................1-2  
MPA 401-70V Description.......................................................................................................1-2  
MPA 401-70V Features..............................................................................................................1-3  
Chapter Two • Cabling....................................................................................................................2-1  
Rear Panel Cabling.....................................................................................................................2-2  
Chapter Three • Setup and Operation................................................................................3-1  
Front Panel Features.................................................................................................................3-2  
Setting Input Level.....................................................................................................................3-2  
Setting Bass and Treble...........................................................................................................3-2  
Remote Control Options.........................................................................................................3-3  
Appendix A • Specifications, Part Numbers, Accessories................................. A-1  
Specifications............................................................................................................................... A-2  
Part Numbers and Accessories........................................................................................... A-4  
Included.parts............................................................................................................................ A-4  
Optional.parts........................................................................................................................... A-4  
Appendix B • Mounting.................................................................................................................B-1  
Plenum Placement......................................................................................................................B-2  
Tabletop Placement...................................................................................................................B-2  
Rack Mounting..............................................................................................................................B-2  
UL.guidelines.for.rack.mounting.............................................................................................B-2  
Rack.mounting.procedure........................................................................................................B-3  
Under-desk Mounting...............................................................................................................B-3  
Through-desk Mounting.........................................................................................................B-3  
Pole Mounting..............................................................................................................................B-3  
All trademarks mentioned in this manual are the properties of their respective owners.  
68-1436-01  
Rev. A  
01.10  
MPA 401-70V • Table of Contents  
 
i
Table of Contents, cont’d  
MPA 401-70V • Table of Contents  
ii  
 
MPA 401-70V  
Chapter One  
1
Introduction  
About.This.Manual  
MPA.401-70V.Description  
MPA.401-70V.Features  
 
Introduction  
About this Manual  
This manual contains information about the Extron MPA 401-70V mini power  
amplifier with instructions for experienced installers on how to install, configure,  
and operate the equipment. Unless otherwise specified, references in this manual  
to the “amplifier” or “MPA” relate to the features or operation of the MPA 401-70V.  
The following symbols are used throughout the manual and carry the following  
meanings:  
A Note icon draws attention to important information.  
N
A Tip provides a suggestion to make setting up or working with the device easier.  
T
A Caution icon warns of things that might damage the equipment.  
C
W
A Warning icon warns of things that might cause injury, death, or other  
severe consequences.  
MPA 401-70V Description  
The Extron MPA 401-70V integrated Mini Power Amplifier provides mono  
amplification for speaker systems that require compact and economical audio  
solutions. The MPA 401 accepts balanced or unbalanced, stereo or mono inputs  
and provides a summed mono output. It delivers up to 40 watts (rms) for a high-  
impedance, 70 V distributed sound system.  
Front panel controls allow easy adjustment of bass and treble volume and input  
level. Volume and muting can be controlled remotely by the Extron VCM 100,  
VC 50, or MLA VC 10.  
It features high efficiency, advanced Class D amplifier design with advanced  
CDRS(Class D Ripple Suppression) technology that eliminates EMI emissions and  
interference with sensitive A/V equipment. The design allows the amplifier to be  
fanless and operate in environments with little or no ventilation. The MPA 401-70V  
meets UL 2043 for smoke and fire code for above--the-ceiling installations.  
Extron  
SI 3CT LP  
Extron  
Full-Range  
MPA 401  
Mini Power  
Ampliꢀer  
Ceiling Speakers  
Extron VC 50  
Volume Controller  
VOLUME  
0
5
VC  
n
o
r
t
x
E
Extron  
MLC 104 IP Plus  
Controller  
Y
A
DISPL  
A
401-70V  
F
OF  
MP  
N
O
T
CLASS  
2
WIRING  
E
M
U
OL  
OUTPUT  
DO NOT GROUND  
OR SHOR  
V
S
A
U
m
IG  
F
0
5
N
O
®
SPEAKER OUTPUTS!  
10  
C
D
E
V
T
IS  
L
T
I
O
T
E
VOL/MUTE  
7
D
1
/V  
S
U
IO  
T
V
D
A
0
U
R
A
A
7
P
P
A
MLC 104 IP  
INPUTS  
(MONO)  
REMOTE  
R
L
)
(MONO  
L
POWER  
R
X
12V  
1.5A MA  
RS-232  
N
A
O
O
L
B
/B  
-Y  
U
U
T
T
T
E
S
E
R
G
/Y  
P
K
LI  
U
T
T
C
A
R
/R  
T
-Y  
ID  
/V  
C
/Y  
-Y  
,B  
,Y  
-
Y
/R  
B
G
R
Y
C
/
H
R-  
/
Y
/V  
4
ID  
VI  
SDI  
YC  
I
3
N
U
P
T
T
U
P
T
R
U
O
L
UDIO  
A
R
4
L
R
3
L
INPUTS  
R
2
A
.3  
L
V
R
0
4
-2  
1
0
0
1
L
Extron  
H
/60  
DVS 304 DVI AD  
Digital Video  
Scaler  
Flat Panel  
Display  
(DVI)  
Audio  
w/ Audio  
R
E
IV  
CE  
E
R
DBS  
Laptop  
(RGB)  
VCR  
(Video)  
DVD  
DSS Receiver  
(Component) (S-video)  
MPA 401-70V • Introduction  
1-2  
 
MPA 401-70V Features  
Patented CDRS(Class D Ripple Suppression) — CDRS is an Extron patented  
technology that eliminates high frequency switching ripple and EMI  
emissions found in all Class D amplifiers. CDRS dramatically improves  
audio performance over conventional Class D amplifier designs and enables  
Extron power amplifiers to be situated near wireless A/V devices without RF  
interference.  
UL 2043 plenum rated — The MPA 401-70V meets UL 2043 for smoke and heat  
release for installation within a plenum airspace above a drop ceiling. Above-  
the-ceiling placement conceals the amplifier to prevent theft and is convenient  
for installing equipment when space inside the room is limited.  
Although the amplifier is plenum rated, the power supply provided with it  
is not. The power supply must not be placed in the plenum space. If the  
amplifier is placed in a plenum space, all cables to and from it must also be  
plenum rated.  
C
Balanced and unbalanced buffered audio inputs — The MPA 401-70V amplifier  
accepts balanced or unbalanced, stereo or mono audio input signals on a  
captive screw connector, and unbalanced audio on both RCA connectors and a  
3.5 mm stereo mini jack.  
The MPA 401-70V amplifier mixes all right channel inputs to a single signal and  
all left channel inputs to a second signal. The right signal and left signal are then  
summed to produce a mono signal.  
N
The three stereo inputs are individually buffered and can be connected to three  
separate sources at the same time without altering performance.  
Quick-plug speaker outputs — Speaker output is on a 5 mm screw lock captive  
screw connector for quick installation.  
ENERGY STAR® Qualified Amplifier — The MPA 401-70V amplifier is an  
ENERGY STAR qualified amplifier and energy efficient product that conserves  
energy and reduces costs.  
Auto-standby with fast power up — automatically places the amplifier into  
standby after 25 minutes of inactivity. It quickly returns to full power status  
in less than one second upon signal detection. The amplifier consumes just 6  
watts when idle and less than 1 watt in standby mode.  
Front panel bass, treble, and input level controls — Bass, treble, and input level  
are easily adjusted from the front panel.  
Fanless design — The MPA 401 does not require fans or vents for cooling, ensuring  
quiet, reliable operation.  
Automatic clip limiter — Detects actual onset of clipping by comparing input  
and output waveforms. Gain is automatically reduced with a slow attack and  
fast release to eliminate clipping. This advanced limiter design protects the  
speakers from clipping distortion and offers superior sonic characteristics  
compared to limiters that use signal compression.  
Remote volume and mute control port — A rear panel, three-pin captive screw  
remote input connector allows remote adjustment of volume and muting. In  
basic installations without third-party control systems, this port allows the  
MPA 401 to be remotely controlled using the optional Extron VCM 100 analog  
volume and mute controller or VC 50 analog volume controller.  
Compact size — The 1U, quarter rack width, 6" deep metal enclosure, offers  
flexible mounting options.  
External universal power supply included (part # 70-725-01) — provides  
worldwide power compatibility.  
MPA 401-70V • Introduction  
1-3  
 
Introduction  
MPA 401-70V • Introduction  
1-4  
 
MPA 401-70V  
Chapter Two  
2
Cabling  
Rear.Panel.Cabling  
 
Cabling  
Rear Panel Cabling  
The illustration below shows the rear panel of the MPA 401-70V:  
CLASS 2 WIRING  
MPA 401-70V  
INPUTS  
(MONO)  
®
US  
DO NOT GROUND  
OR SHORT  
LISTED  
AUDIO/VIDEO  
APPARATUS  
17TT  
SPEAKER OUTPUTS!  
L
10V  
50mA  
OUTPUT  
POWER  
VOL/MUTE  
R
12V  
1.5 A MAX  
REMOTE  
R
L (MONO)  
70V  
3
4
6
1
2
5
MPA 401-70V Rear Panel Features  
Power connector — Connect the two pole, 3.5 mm captive screw connector from the  
12 VDC, 1 A external power supply (provided) to this socket on the rear panel. Ensure  
the connections have the correct polarity as shown below:  
a
POWER  
Power Receptacle  
Smooth  
Ridges  
12V  
1.5 A MAX  
A
A
SECTION A–A  
3/16”  
(5 mm) Max.  
Power Supply  
Output Cord  
DC Power Cord  
Captive Screw Connector  
Ground  
+12 VDC  
External  
Power Supply  
(12 VDC, 5 A )  
AC Power Cord  
The length of the exposed wires in the stripping process is critical. The ideal  
length is 3/16 inches (5 mm). Any longer and the exposed wires may touch,  
causing a short circuit between them. Any shorter and the wires can be easily  
pulled out even if tightly fastened by the captive screws.  
N
N
Do not tin the wires. Tinned wire does not hold its shape and can become loose  
over time.  
RCA input connectors — These connectors accept  
unbalanced, line level audio signals. The input can be  
stereo (using two RCA jacks) or mono (using a single  
RCA jack plugged into the left/mono socket).  
INPUTS  
(MONO)  
b
c
L
If unused, the connectors automatically terminate to  
lower the noise floor.  
R
3.5 mm stereo input — This input also accepts  
unbalanced, line level audio signals through a 3.5 mm  
tip ring sleeve (TRS) stereo jack. If unused, the connector automatically terminates to  
lower the noise floor.  
R
L (MONO)  
MPA 401-70V • Cabling  
2-2  
 
     
Balanced or unbalanced audio input connector — This 5-pole 3.5 mm captive  
screw connector accepts line level, balanced or unbalanced, mono or stereo audio  
d
e
Connect the input wires to the correct terminal. Connecting the ground  
wire ( ) to a negative (-) terminal will damage the audio output circuits.  
C
10V  
50mA  
Remote input connector — This 3-pole captive screw connector allows  
the option of using a wall-mounted audio controller or MediaLink product to  
control volume and mute levels remotely.  
VOL/MUTE  
Options for remote control include the Extron VC 50, VCM 100 AAP,  
VCM 100 MAAP, or MLA VC10. Third party 10k potentiometer volume  
REMOTE  
controllers can also be connected to this port. See the notes on page 2-2 for important  
Wire the remote control connector to the VCM 100 MAAP as shown in the figure  
and instructions below:  
10 V  
Pin 1 is 10 VDC reference voltage.  
Pin 2 (VOL/MUTE) has two functions:  
2K  
Volume Pot  
Vol/Mute  
GND  
o
It can be used as a variable voltage input. 10K Ohms  
Mute  
Switch  
The volume control DC voltage range is  
0 to 10 V, with 0 V giving full attenuation  
and 10 V giving maximum volume.  
o
It can be used for remote control muting. Sound is muted while the mute  
pin is shorted to ground.  
Pin 3 is ground.  
All nominal levels are at 10%  
N
More information about remote control of the MPA 401-70V can be found on page 3-3.  
Speaker connection — Connect the speakers to this socket using the 2-pole, 5 mm  
f
screw-lock captive screw connector.  
OUTPUT  
The three left channel inputs (RCA, TRS and captive screw) are  
summed to form Left Sum, with weightings proportional to  
their respective sensitivities. Similarly the three right channel  
inputs are summed to form a Right Sum. Left Sum and Right  
Sum are mixed and amplified to provide one high voltage,  
70V  
mono output, which provides up to 40 W for a 70 V line distributed sound system.  
Do not short the + and - outputs to each other or to the ground ( ) as this  
will damage the amplifier.  
C
MPA 401-70V • Cabling  
2-3  
 
 
Cabling, cont’d  
MPA 401-70V • Cabling  
2-4  
 
MPA 401-70V  
Chapter Three  
3
Setup and Operation  
Front.Panel.Features  
Setting.Input.Level  
Setting.Bass.and.Treble  
Remote.Control.Options  
 
Setup and Operation  
Front Panel Features  
The illustration below shows the front panel of the MPA 401-70V.  
2
LEVEL  
BASS  
TREBLE  
1
MPA 401  
MINI POWER AMPLIFIER  
Power LED — The green LED is on when the MPA 401 unit is receiving power.  
a
b
Potentiometers — These three front panel potentiometers are used to optimize  
level, bass, and treble settings. For further details, see below.  
Setting Input Level  
LEVEL  
BASS  
TREBLE  
Adjust the MPA 401-70V input level as follows:  
1. If necessary, unplug the remote plug from the  
unit.  
MPA 401  
MINI POWER AMPLIFIER  
2. If connecting the amplifier to a system  
with adjustable volume, set the volume  
to its lowest point. Then adjust the MPA 401-70V level potentiometer fully  
counterclockwise to its minimum setting.  
3. Set the system volume to its maximum level. No sound should come out.  
4. Slowly increase the MPA 401-70V level until sound distortion starts to occur.  
Lower the level slightly until the distortion disappears. This setting ensures  
that, whatever the system volume setting may be, no clipping occurs.  
Setting Bass and Treble  
Adjust the MPA 401-70V bass and treble as follows:  
1. Use the bass potentiometer to increase or decrease the bass shelving 10 dB at  
100 Hz and below.  
2. Use the treble potentiometer to increase or decrease the treble shelving 10 dB  
at 10 kHz and above.  
Turning the bass or treble potentiometers counter clockwise will decrease the  
output at the specified frequencies. Turning the potentiometers clockwise will  
increase the output. When the potentiometer is at the center detent, flat response  
is achieved.  
N
MPA 401-70V • Setup and Operation  
3-2  
 
 
Remote Control Options  
Extron  
SI 3CT LP  
Extron  
Full-Range  
MPA 401  
Mini Power  
Ampliꢀer  
Ceiling Speakers  
VOLUME  
0
5
C
V
n
o
r
t
x
E
1
Extron VC 50  
Volume Controller  
Y
A
DISPL  
A
401-70V  
F
OF  
MP  
ON  
T
CLASS  
2
WIRING  
OUTPUT  
70V  
DO NOT GROUND  
OLUME  
OR SHOR  
2
Extron  
V
S
U
50mA  
®
SPEAKER OUTPUTS!  
CONFIG  
D
E
V
T
IS  
10  
L
T
I
O
T
E
VOL/MUTE  
7
D
1
/V  
S
U
IO  
T
D
P
A
R
U
A
A
P
A
MLC 104 IP Plus  
MLC 104 IP  
INPUTS  
(MONO)  
REMOTE  
Controller  
R
L
(MONO)  
L
POWER  
R
X
12V  
1.5A MA  
RS-232  
N
O
LA  
B
B  
-Y  
U
U
T
G
RESET  
P
/Y  
LN
U
CT  
A
R
/R  
T
-Y  
ID  
/V  
C
/Y  
-Y  
,B  
,Y  
-
Y
/R  
B
G
R
/
R-Y  
/
C
Y
/VID  
SDI  
YC  
I
3
N
P
U
P
T
1
T
U
P
T
R
U
O
L
UDIO  
A
R
4
L
R
3
L
INPUTS  
R
2
A
.3  
L
V
R
0
4
-2  
1
0
0
1
L
Extron  
H
0
/
DVS 304 DVI AD  
Digital Video  
Scaler  
Flat Panel  
Display  
(DVI)  
Audio  
w/ Audio  
R
E
IV  
E
C
E
R
S
B
D
Laptop  
(RGB)  
VCR  
(Video)  
DVD  
DSS Receiver  
(S-video)  
(Component)  
10 V  
Extron VCM 50 volume and mute control —  
For a system designed to control the  
MPA 401-70V volume directly, use a 10 k Ohm  
potentiometer to control volume via the remote  
port on the amplifier. Follow the instructions  
in the product manual.  
a
b
2K  
Volume Pot  
10K Ohms  
Vol/Mute  
Mute  
Switch  
GND  
Using a MediaLinkController — For a system with variable audio output,  
connect the audio output to the amplifier’s audio input. In the above example, a  
MediaLink controller adjusts the audio volume via a network connection. Follow  
the instructions in the product manual.  
MPA 401-70V • Setup and Operation  
 
3-3  
 
Setup and Operation, cont’d  
MPA 401-70V • Setup and Operation  
3-4  
 
MPA 401-70V  
Appendix A  
A
Specifications, Part Numbers,  
Accessories  
Specifications  
Part.Numbers.and.Accessories  
 
Specifications, Part Numbers, Accessories  
Specifications  
Audio  
Voltage gain  
RCA and TRS inputs......... 222x (47 dB)  
Captive screw input.......... 57x (35 dB)  
CMRR.............................................. 75 dB (typical) @ 1 kHz  
Bass adjustment............................. 10 dB @ 100 Hz  
Treble adjustment.......................... 10 dB @ 10 kHz  
Audio input  
Number/signal type..................... 1 stereo/mono, balanced/unbalanced input  
2 stereo/mono, unbalanced inputs  
(The three inputs are individually buffered and mixed together. Stereo  
signals are actively summed into a mono signal.)  
Connectors ..................................... (1) 3.5 mm captive screw connector, 5 pole (main input)  
(1) 3.5 mm mini audio jack (tip, ring, sleeve [TRS])  
1 pair RCA  
Impedance...................................... >10k ohms balanced/unbalanced, DC coupled  
Maximum level.............................. +20 dBu (balanced, captive screw) or +4 dBV (unbalanced, RCA/TRS) at  
1% THD+N  
Input sensitivity  
RCA and TRS inputs......... -10 dBV (One input driven), -16dBV (Both inputs are summed)  
Captive screw input.......... +4 dBu if driven by one input  
-2 dBu if both inputs are summed  
0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV 2 dBu  
N
Audio output  
Number/signal type..................... 1 single channel (mono) 70 V  
Connectors ..................................... (1) 5 mm screw lock connector, 2 pole  
Load impedance............................ 125 ohms minimum  
Frequency response ...................... 80 Hz to 20 kHz, 3 dB, 1 watt  
THD + Noise.................................. <0.2% @ 1 kHz at 3 dB below clipping  
S/N.................................................. >75 dB @ 20 Hz to 20 kHz  
Damping factor.............................. >100  
High pass filter .............................. 80 Hz, 12 dB/octave roll off  
Amplifier type ............................... Class D  
Output power................................ 40 watts (rms), 70 V, 1 kHz, 1% THD  
Control/remote — amplifier  
Control port.................................... (1) 3.5 mm captive screw connector, 3 pole  
Pin configuration........................... Pin 1 = +10 VDC (50 mA max.), pin 2 = volume/mute control (variable  
voltage), pin 3 = GND  
Volume control voltage range ..... 0 V (mute) to 10 V (maximum volume)  
MPA 401-70V • Specifications, Part Numbers, Accessories  
A-2  
 
General  
External power supply................. 100 VAC to 240 VAC, 50-60 Hz, external; to 12 VDC, 5 A (max.), regulated  
Power input requirements........... 12 VDC, up to 5 A  
Power draw requirements ........... For amplifier and external power suppply  
Typical................................. 13 W (1/8 power [pink noise] at 125 ohms)  
Quiescent............................ 8 watts  
Standby............................... <1 watt (triggered by contact closure or after 25 minutes [ 5 minutes] with  
no signal)  
Temperature/humidity................ Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing  
Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing  
Cooling ........................................... Convection, no vents  
Thermal dissipation  
Standby............................... <1 watt (3 BTU/hr)  
Idle....................................... 6 watts (21 BTU/hr)  
1/8 power (pink noise)..... 8 watts (28 BTU/hr)  
Mounting  
Rack mount........................ Yes, with optional 1U rack shelf or back of rack mounting kit  
Furniture mount................ Yes, with optional under-desk mounting kit  
Pole mount......................... Yes, with optional pole mounting kit  
Enclosure type ............................... Metal  
Enclosure dimensions................... 1.7" H x 4.3" W x 6.0" D (1U high, quarter rack wide)  
(4.3 cm H x 10.9 cm W x 15.2 cm D)  
(Depth excludes connectors.)  
Product weight .............................. 0.6 lbs (0.3 kg)  
Shipping weight ............................ 3 lbs (2 kg)  
Vibration......................................... ISTA 1A in carton (International Safe Transit Association)  
Regulatory compliance  
Safety................................... CE, c-UL, UL  
UL rated for use in plenum airspaces: meets UL 2043 for heat and smoke  
release, excluding the power supply; meets UL 60065 and IEC 60065 for A/V  
equipment safety.  
EMI/EMC .......................... CE, C-tick, FCC Class B, ICES Class B, VCCI  
Environmental................... Complies with the appropriate requirements of CEC, ENERGY STAR®  
(ENERGY STAR® qualified amplifier), EU code of conduct, RoHS, WEEE  
MTBF............................................... 30,000 hours  
Warranty......................................... 3 years parts and labor  
All nominal levels are at 10%  
N
N
Specifications are subject to change without notice.  
MPA 401-70V • Specifications, Part Numbers, Accessories  
 
A-3  
Specifications, Part Numbers, Accessories, cont’d  
Part Numbers and Accessories  
Included parts  
Description  
Part number  
MPA 401-70V  
60-845-01  
External 12 VDC, 5 A power supply  
IEC power cord  
(1) 2-pole 5 mm terminal block plug  
(1) 5-pin 3.5 mm captive screw plug  
(1) 3-pin 3.5 mm captive screw plug  
(1) 2-pin 3.5 mm power captive screw plug  
(2) Velcro tape roll  
Tweeker (small screwdriver)  
MPA 401-70V Setup Guide  
Optional parts  
Description  
Part number  
RSU 126 1U, 6" deep, universal rack kit  
RSB 126 1U, 6" deep basic rack shelf  
RSU 129 1U, 9.5" deep, universal rack kit  
RSB 129 1U, 9.5" deep basic rack shelf  
MBU 125 Under-desk mounting kit  
MBD 129 Through-desk mounting kit  
PMK 100 Pole mount kit  
60-190-10  
60-604-11  
60-190-01  
60-604-02  
70-077-01  
70-077-02  
70-217-01  
70-563-03  
70-725-01  
70-530-02  
70-396-11  
70-397-11  
60-502-01  
42-103-03  
42-070-03  
42-120-13  
22-150-03  
22-153-03  
26-627-25  
26-627-35  
26-627-50  
26-627-100  
PMK 350 Pole mount kit  
EPS 1250 C External Power Supply Replacement kit  
VC 50 Volume control wall plate  
VCM 100 AAP Volume/mute - AAP  
VCM 100 MAAP Volume/mute - MAAP  
MLA VC10 Volume control module  
SI 3CT LP Ceiling speakers  
SI 26 CT Ceiling speakers  
FF 120 T Ceiling speakers  
SPK18/1000 Non-Plenum 1000' (300 m) spool  
SPK18P/1000 Plenum 1000' (300 m) spool  
SPK 18 Pre-cut speaker cable 25' (7.6 m)  
SPK 18 Pre-cut speaker cable 35' (10.6 m)  
SPK 18 Pre-cut speaker cable 50' (15.2 m)  
SPK 18 Pre-cut speaker cable 100' (30.4 m)  
MPA 401-70V • Specifications, Part Numbers, Accessories  
A-4  
 
MPA 401-70V  
Appendix B  
B
Mounting  
Plenum.Placement  
Tabletop.Placement  
Rack.Mounting  
Under-desk.Mounting  
Through-desk.Mounting  
Pole.Mounting  
 
Mounting  
Plenum Placement  
The MPA 401-70V amplifier meets UL 2043 requirements for heat and smoke  
release. It can be installed in the ceiling, out of sight, with reduced risk of theft.  
Although the amplifier is plenum rated, the power supply provided with it  
is not. The power supply must not be placed in the plenum space. Cables  
to and from the amplifier must also be plenum rated.  
C
Tabletop Placement  
Attach the four provided rubber feet to the bottom of the unit and place it in any  
convenient location.  
Rack Mounting  
UL guidelines for rack mounting  
The following Underwriters Laboratories (UL) guidelines are relevant to the safe  
installation of this product in a rack:  
1. Elevated operating ambient temperature — If the unit is installed in a closed  
or multi-unit rack assembly, the operating ambient temperature of the rack  
environment may be greater than room ambient temperature. Therefore, install  
the equipment in an environment compatible with the maximum ambient  
temperature (TMA: +122 °F, +50 °C) specified by Extron.  
2. Reduced air flow — Install the equipment in the rack so that the equipment  
gets adequate air flow for safe operation.  
3. Mechanical loading — Mount the equipment in the rack so that uneven  
mechanical loading does not create a hazardous condition.  
4. Circuit overloading — Connect the equipment to the supply circuit and  
consider the effect that circuit overloading might have on overcurrent  
protection and supply wiring. Appropriate consideration of the equipment  
nameplate ratings should be used when addressing this concern.  
5. Reliable earthing (grounding) — Maintain reliable grounding of  
rack-mounted equipment. Pay particular attention to supply connections other  
than direct connections to the branch circuit (such as the use of power strips).  
MPA 401-70V • Mounting  
B-2  
 
Rack mounting procedure  
The unit can be mounted on any of these optional rack systems:  
RSU 126 — 6" deep 1U universal rack shelf kit (part # 60-190-10)  
RSB 126 — 6" deep 1U basic rack shelf (part # 60-604-11)  
RSU 129 — 9.5" deep 1U universal rack shelf kit (part # 60-190-01)  
RSB 129 — 9.5" deep 1U basic rack shelf (part # 60-604-02)  
To mount the scaler on a rack shelf, follow the instructions provided with the shelf  
accessories.  
Use only the two holes indicated in the diagram below for mounting the  
MPA 401. The other four holes anchor stand-offs for the internal circuit  
boards; using them may damage the amplifier and will not provide secure  
mounting for the unit.  
C
#4-40 Thread Thru  
Rack Mounting  
#4-40 Thread Thru  
Rack Mounting  
Under-desk Mounting  
Mount the unit under a desk or podium, using the optional Extron MBU 125  
under-desk mounting kit (part # 70-077-01) by following the instructions provided  
with the MBU 125 kit.  
Through-desk Mounting  
Mount the unit through a desk or podium using the optional Extron MBD 129  
through desk mounting kit (part # 70-077-02) by following the instructions  
provided with the MBD 129 kit.  
Pole Mounting  
The amplifier can be mounted above a projector using either of these optional  
Extron Pole Mounting Kits:  
PMK 100 Pole mount kit (part # 70-217-01)  
PMK 350 Pole mount kit (part # 70-563-03)  
Follow the instructions provided with each kit.  
MPA 401-70V • Mounting  
B-3  
 
Mounting, cont’d  
MPA 401-70V • Mounting  
B-4  
 
Extron Warranty  
Extron Electronics warrants this product against defects in materials and workmanship for a period  
of three years from the date of purchase. In the event of malfunction during the warranty period  
attributable directly to faulty workmanship and/or materials, Extron Electronics will, at its option,  
repair or replace said products or components, to whatever extent it shall deem necessary to restore  
said product to proper operating condition, provided that it is returned within the warranty period,  
with proof of purchase and description of malfunction to:  
USA, Canada, South America,  
and Central America:  
Extron Electronics  
1001 East Ball Road  
Anaheim, CA 92805  
Japan: Extron Electronics, Japan  
Kyodo Building, 16 Ichibancho  
Chiyoda-ku, Tokyo 102-0082  
Japan  
U.S.A.  
Europe, Africa, and the Middle East:  
Extron Europe  
Hanzeboulevard 10  
3825 PH Amersfoort  
The Netherlands  
China:  
Extron China  
686 Ronghua Road  
Songjiang District  
Shanghai 201611  
China  
Asia:  
Middle East:  
Extron Asia  
Extron Middle East  
Dubai Airport Free Zone  
F12, PO Box 293666  
United Arab Emirates, Dubai  
135 Joo Seng Road, #04-01  
PM Industrial Bldg.  
Singapore 368363  
Singapore  
This Limited Warranty does not apply if the fault has been caused by misuse, improper handling  
care, electrical or mechanical abuse, abnormal operating conditions or a modification to the product  
that has not been authorized by Extron.  
If it has been determined that the product is defective, please call Extron and ask for an Applications  
Engineer at (714) 491-1500 (USA), 31.33.453.4040 (Europe), 65.383.4400 (Asia), or 81.3.3511.7655 (Japan)  
to receive an RA# (Return Authorization number). This will begin the repair process as quickly as  
possible.  
Units must be returned insured, with shipping charges prepaid. If not insured, you assume the risk of  
loss or damage during shipment. Returned units must include the serial number and a description of  
the problem, as well as the name of the person to contact in case there are any questions.  
Extron Electronics makes no further warranties either expressed or implied with respect to the  
product and its quality, performance, merchantability, or fitness for any particular use. In no event  
will Extron Electronics be liable for direct, indirect, or consequential damages resulting from any  
defect in this product even if Extron Electronics has been advised of such damage.  
Please note that laws vary from state to state and country to country, and that some provisions of this  
warranty may not apply to you.  
 
Installation Checklist  
Select a suitable location and mount the amplifier (see appendix B).  
Adjust the Bass and Treble (see page 3-2).  
Extron USA-West Extron USA-East Extron Europe  
Extron Asia  
Extron Japan  
Extron China  
Extron Middle East  
Headquarters  
+800.633.9876  
+800.3987.6673  
+800.7339.8766  
+81.3.3511.7655  
+81.3.3511.7656 FAX  
+400.883.1568  
+971.4.2991800  
+971.4.2991880 FAX  
Inside USA / Canada Only  
Inside Europe Only  
Inside Asia Only  
Inside China Only  
+800.633.9876  
Inside USA / Canada Only  
+1.919.863.1794  
+1.919.863.1797 FAX  
+31.33.453.4040  
+31.33.453.4050 FAX  
+65.6383.4400  
+65.6383.4664 FAX  
+86.21.3760.1568  
+86.21.3760.1566 FAX  
+1.714.491.1500  
+1.714.491.1517 FAX  
© 2010 Extron Electronics. All rights reserved.  
 

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