Extron electronic Stereo Amplifier MPA 401 User Manual

User Guide  
Audio  
MPA 401 Series  
Mini Power Amplifiers  
68-1436-01 Rev. E  
06 13  
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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 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. There is no guarantee that interference will not occur. If this equipment  
does cause interference to radio or television reception, which can be determined by turning  
the equipment off and on, you are 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.  
NOTE: For more information on safety guidelines, regulatory compliances, EMI/  
EMF compatibility, accessibility, and related topics, see the “Extron Safety and  
Regulatory Compliance Guide” on the Extron website.  
Copyright  
© 2013 Extron Electronics. All rights reserved.  
Trademarks  
All trademarks mentioned in this guide are the properties of their respective owners.  
The following registered trademarks( ), registered service marks( ), and trademarks( ) are the property of  
RGB Systems, Inc. or Extron Electronics:  
®
SM  
Registered Trademarks(®)  
AVTrac, Cable Cubby, CrossPoint, eBUS, EDID Manager, EDID Minder, Extron, Flat Field,GlobalViewer, Hideaway, Inline, IP Intercom, IP Link,  
Key Minder, LockIt, MediaLink, PoleVault, PURE3, Quantum, SoundField, SpeedMount, SpeedSwitch, System Integrator, TeamWork, TouchLink,  
V-Lock, VersaTools, VN-Matrix, VoiceLift, WallVault, WindoWall  
Registered Service Mark(SM) : S3 Service Support Solutions  
Trademarks()  
AAP, AFL (Accu-Rate Frame Lock), ADSP (Advanced Digital Sync Processing), AIS (Advanced Instruction Set), Auto-Image, CDRS (Class D  
Ripple Suppression), DDSP (Digital Display Sync Processing), DMI (Dynamic Motion Interpolation), Driver Configurator, DSP Configurator, DSVP  
(Digital Sync Validation Processing), FastBite, FOXBOX, IP Intercom HelpDesk, MAAP, MicroDigital, PowerCage, ProDSP, QS-FPC (QuickSwitch  
Front Panel Controller), Scope-Trigger, SIS, Simple Instruction Set, Skew-Free, SpeedNav, Triple-Action Switching, XTP, XTP Systems, XTRA,  
ZipCaddy, ZipClip  
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Conventions Used in this Guide  
Notifications the following are used:  
ATTENTION: Attention indicates a situation that may damage or destroy the product  
or associated equipment.  
NOTE: A note draws attention to important information.  
Specifications Availability  
Product specifications are available on the Extron website, www.extron.com.  
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Contents  
Introduction .................................................... 1  
Important Safety Instructions.............................. 1  
MPA 401-70V and MPA 401-100V Description... 2  
MPA 401-70V and MPA 401-100V Features....... 3  
Rear Panel and Cabling................................ 4  
Rear Panel.......................................................... 4  
Power Input........................................................ 5  
Audio Inputs....................................................... 6  
Remote Input Port.............................................. 7  
Speaker Connections......................................... 9  
Setup and Operation ................................... 10  
Front Panel Features......................................... 10  
Setting Input Level............................................ 11  
Setting Bass and Treble.................................... 11  
Remote Control Options................................... 12  
Troubleshooting................................................ 13  
Amplifier Fails to Exit Standby Mode  
Promptly...................................................... 13  
Amplifier Enters Standby Mode  
Too Early...................................................... 13  
Reference Material...................................... 14  
Mounting.......................................................... 14  
Plenum Placement........................................ 14  
Tabletop Placement...................................... 14  
Rack Mounting ............................................. 14  
Under-desk, Through-desk, and Projector  
Mounting..................................................... 15  
MPA 401-70V and MPA 401-100V • Contents  
v
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MPA 401-70V and MPA 401-100V • Contents  
vi  
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Introduction  
This guide contains information about the Extron MPA 401-70V and MPA 401-100V mini  
power amplifiers with instructions for experienced installers on how to install, configure,  
and operate the equipment. Unless otherwise specified, references in this guide to the  
“amplifier,” “MPA,” or “MPA 401” relate to the features or operation of either amplifier.  
This section provides the following information:  
Important Safety Instructions  
1. Read these instructions.  
2. Keep these instructions.  
3. Heed all warnings.  
4. Follow all instructions.  
5. Do not use this apparatus near water.  
6. Clean only with dry cloth.  
7. Do not block any ventilation openings. Install in accordance with the instructions of  
the manufacturer.  
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other  
apparatus (including amplifiers) that produce heat.  
9. 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 safety. If the provided plug does not fit into the 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 or 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 if the 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.  
MPA 401-70V and MPA 401-100V • Introduction  
1
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MPA 401-70V and MPA 401-100V Description  
The Extron MPA 401-70V and MPA 401-100V integrated mini power amplifiers provide  
mono amplification for speaker systems that require compact and economical audio  
solutions. Both amplifiers accept balanced or unbalanced, stereo or mono inputs and  
provide a summed mono output. The MPA 401-70V delivers up to 40 watts (rms) for a  
high-impedance, 70 V distributed sound system. The MPA 401-100V delivers up to 40  
watts (rms) for a high-impedance, 100 V distributed sound system.  
Front panel controls allow easy adjustment of bass, treble, and input levels. Volume can  
be controlled remotely by the Extron VCM 100, VC 50, or MLA VC 10.  
Both amplifiers feature high efficiency, Class D amplifier design with advanced CDRS  
(Class D Ripple Suppression) technology that eliminates EMI emissions and interference  
with sensitive AV equipment. The design allows the amplifiers to be fanless and operate in  
environments with little or no ventilation. Both amplifiers meet UL 2043 for smoke and fire  
code for above-the-ceiling installations.  
Extron  
SI 3CT LP  
Full-Range  
Ceiling Speakers  
Extron VC 50  
Volume Controller  
ME  
VOLU  
0
5
C
V
n
o
r
t
x
E
Extron  
MLC 104 IP Plus  
Controller  
00V  
Y
A
DISPL  
A
4
0
1
-1
F
OF  
M
P
ON  
T
TPU  
OU  
100V
LUME  
O
V
ONFIG  
C
A
E
REMOTE  
m  
E
10V
G
7
I
WIRIN  
MLC 104 IP  
R
CLASS  
2
MMED)  
L(SU  
G
C
V
E  
MED)  
L
(SUM  
R
S
POWE  
INPUT  
R
X
12V  
1.5A MA  
Extron  
MPA 401  
Mini Power  
Ampliꢀer  
RS-232  
N
O
O
LA  
B
/B  
-Y  
U
U
T
T
T
E
G
/Y  
RES  
P
P
LINK  
A
R
T
T
-Y  
/R  
ID  
/V  
C
/Y  
-Y  
,B  
,Y  
-
Y
/R  
B
G
R
Y
C
R-  
/
Y
/VID  
4
I
I
SD  
V
YC  
I
N
N
I
Y  
3
P
U
U
P
T
T
1
T
U
P
T
R
U
O
L
O
UDI  
A
R
4
L
R
3
L
INPUTS  
R
2
A
L
.3  
0V  
R
24  
0-  
1
10  
L
Extron  
DVS 304 DVI AD  
Digital Video  
Scaler  
Flat Panel  
Display  
(DVI)  
Audio  
with Audio  
R
VE  
EI  
EC  
R
BS  
D
Laptop  
(RGB)  
VCR  
(Video)  
DVD  
(Component)  
DSS Receiver  
(S-video)  
Figure 1. Typical Application for the MPA 401  
MPA 401-70V and MPA 401-100V • Introduction  
2
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MPA 401-70V and MPA 401-100V 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 amplifiers meet 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.  
Balanced and unbalanced buffered audio inputs — Both amplifiers accept 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 signals from multiple inputs are summed to produce a single output signal (see  
figure 6 on page 9).  
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 amplifiers — The MPA 401-70V and MPA 401-100V  
amplifiers are ENERGY STAR qualified amplifiers and energy efficient products that  
conserve energy and reduce costs.  
Auto power-down with fast power up — Automatically places the amplifiers into  
standby after 25 minutes of inactivity. They quickly return to full power status in less than  
one second upon signal detection. The amplifiers consume 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 amplifiers do 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 amplifiers to be remotely  
controlled using the optional Extron VCM 100 series analog volume and mute controller or  
VC 50 analog volume controller.  
Compact size — The 1U, quarter rack width, 6 inch deep metal enclosure, offers flexible  
mounting options.  
MPA 401-70V and MPA 401-100V • Introduction  
3
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Rear Panel and  
Cabling  
This section describes the rear panel features and cabling of the MPA 401-70V and  
MPA 401-100V.  
Rear Panel  
The illustration below shows the rear panel of the amplifiers:  
MPA 401-70V  
L
REMOTE  
10V 50mA  
70V OUTPUT  
(SUMMED)  
POWER  
(SUMMED)  
L
R
R
12V  
V
C
G
CLASS 2 WIRING  
1.5A MAX  
INPUTS  
3
4
6
1
2
5
MPA 401-100V  
100V OUTPUT  
L
REMOTE  
10V 50mA  
(SUMMED)  
POWER  
(SUMMED)  
L
R
R
12V  
V
C
G
CLASS 2 WIRING  
1.5A MAX  
INPUTS  
3
4
6
1
2
5
Figure 2. MPA 401-70V and MPA 401-100V Rear Panel Features  
NOTE: Control signal ground pins may be labelled , , or G. Audio ground pins may  
be labelled or . The wiring and function are the same, whichever way the product  
is labelled.  
MPA 401-70V and MPA 401-100V • Rear Panel and Cabling  
4
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Power Input  
a Power receptacle — A 36 W desktop power supply is provided.  
ATTENTION: When the PS 1230 power supply is connected to the MPA 401, it  
must not be shared with any other devices.  
MPA 401 series  
Amplifier  
PS 1230 Power Supply  
AC Power Cord  
MPA 401 series  
Amplifier  
POWER  
Smooth  
Ridges  
POWER  
Power Receptacle  
A
A
DC Power  
Outputs  
12V  
1.5 A MAX  
12V  
1.5 A MAX  
Power Supply  
Output Cord  
DO NOT USE  
DC Power Cord  
Captive Screw Connector  
Captive Screw  
Connector  
3/16"  
(5 mm) Max.  
SECTION A–A  
Tie  
Wrap  
Power Supply  
Output Cord  
Figure 3. Connecting the PS 1230 Power Supply to an MPA 401 Amplifier  
Connect one end of the DC power cord to one of the two pole, 3.5 mm captive screw  
outlets on the power supply. Connect the other end into the power receptacle on the  
rear panel of the amplifier, as shown in figure 3 above. The power cord connectors are  
correctly wired when shipped.  
ATTENTION:  
Always use a power supply supplied by or specified by Extron. Use of an  
unauthorized power supply voids all regulatory compliance certification and  
may cause damage to the supply and the end product.  
Suitable for use in environmental air space in accordance with  
Section 300.22.C of the National Electrical Code, and Sections 2-128,  
12-010(3) and 12-100 of the Canadian Electrical Code, Part 1, C22.1.  
Unless otherwise stated, the AC/DC adapters are not suitable for use in air  
handling spaces or in wall cavities. The power supply is to be located within  
the same vicinity as the Extron AV processing equipment in an ordinary  
location, Pollution Degree 2, secured to the equipment rack within the  
dedicated closet, podium, or desk.  
The installation must always be in accordance with the applicable provisions  
of National Electrical Code ANSI/NFPA 70 and the Canadian Electrical Code.  
The power supply shall not be permanently fixed to building structure or  
similar structure.  
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. The DC power cord  
provided with the unit is not plenum rated.  
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.  
NOTE: Do not tin the wires. Tinned wire does not hold its shape and can become  
loose over time.  
MPA 401-70V and MPA 401-100V • Rear Panel and Cabling  
5
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Audio Inputs  
Use the rear panel receptacles (see figure at right)  
to connect audio sources to the amplifier. Wire the  
connectors as shown below. The balloon numbers refer  
to the figure to the right.  
3
4
L
(SUMMED)  
2
(SUMMED)  
L
R
R
NOTE: The ground pins of the input receptacles  
may be labeled or (see the images to the  
right). The wiring and function are the same  
whichever way the product is labeled.  
INPUTS  
INPUTS  
L
(MONO)  
3
4
2
R
R
L
(MONO)  
Tip (+)  
b RCA input receptacles — These receptacles accept  
unbalanced, line level audio signals. The input can be stereo,  
using two RCA connectors, or mono, using a single RCA  
connector plugged into the left (Summed) receptacle.  
Sleeve (  
)
RCA Connector  
If unused, the receptacles automatically terminate to lower the  
noise floor.  
Tip (L)  
c 3.5 mm TRS stereo input receptacle — This input also  
accepts unbalanced, line level audio signals through a  
3.5 mm tip ring sleeve (TRS) stereo connector. If unused, the  
receptacle automatically terminates to lower the noise floor.  
Ring (R)  
Sleeve (  
)
3.5 mm TRS Connector  
Tip  
d Balanced or unbalanced input  
Ring  
Tip  
Sleeve  
Sleeves  
Tip  
Ring  
receptacle — This 5-pole 3.5 mm  
Tip  
Sleeve  
captive screw receptacle accepts  
line level, balanced or unbalanced,  
mono or stereo audio signals (see  
Unbalanced Stereo Input  
Balanced Stereo Input  
the attention and the note on  
page 6 for important information  
about connecting wires to captive  
screw connectors).  
Tip  
Ring  
Tip  
Sleeve  
Sleeve  
Unbalanced Mono Input  
Balanced Mono Input  
MPA 401-70V and MPA 401-100V • Rear Panel and Cabling  
6
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Remote Input Port  
e Remote input port — This 3-pin, captive screw  
REMOTE  
10V 50mA  
10V  
50mA  
port allows a wall-mounted audio controller to  
control volume and mute levels remotely (see  
Remote Control Options on page 12 if using a  
MediaLink controller).  
VOL/MUTE  
V
C
G
NOTE: The remote control port may be labeled  
in one of two ways (see the diagram to the  
right). The wiring and function are the same  
whichever way the product is labeled.  
REMOTE  
Wiring for remote control  
Options for remote control include the Extron VC 50, VCM 100 AAP, VCM 100 MAAP,  
VCM 200 series, and MLA VC10 Plus. For information about part numbers, see  
www.extron.com. Third party 10k potentiometer volume controllers can also be  
connected to this port.  
Figure 4 and the instructions below, show the wiring for the VCM 100 MAAP. Wiring other  
remote control connectors is similar.  
REMOTE  
10V  
50mA  
V
C
G
10 V (Pin 1)  
2K  
Vol/Mute  
(Pin 2)  
Volume Pot  
10K Ohms  
Mute  
Switch  
GND (Pin 3)  
Figure 4. Remote Control Wiring  
Pin 1 is 10 VDC reference voltage.  
Pin 2 (Vol/Mute) can be used as a variable voltage input between 0 and 10 VDC, with  
0 V giving full attenuation and 10 V giving maximum volume. It can also be used for  
remote control muting. Sound is muted while the mute pin is shorted to ground.  
Pin 3 is ground.  
NOTE: All nominal levels are at 10%.  
MPA 401-70V and MPA 401-100V • Rear Panel and Cabling  
7
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Controlling multiple amplifiers with one volume controller  
Several MPA 401 units can be daisy-chained so that one volume controller can  
simultaneously regulate the volume of all the amplifiers.  
NOTES:  
As additional amplifiers are added to the daisy chain, the sensitivity of the  
volume potentiometer will change. The maximum volume level (fully clockwise)  
will not be affected. However the effectiveness of the minimum volume level  
(fully counterclockwise) in reducing the volume to inaudible levels decreases as  
more amplifiers are added to the daisy chain.  
When more than two MPAs are attached to the chain, sound may begin to be  
heard even if the levels have been set to their lowest. The muting of the output  
however can be remedied with a contact closure button attached between the  
Vol/Mute and Ground pin of the first MPA in the chain.  
To regulate multiple amplifiers with a single volume controller, follow these instructions:  
1. Attach all three pins of the volume controller to the corresponding pins on the first  
MPA 401 unit only (ground to ground; Vol/Mute to Vol/Mute; and 10 V to 10 V).  
2. Use jumper wires to connect the Vol/Mute pins of the first amplifier and each  
successive amplifier.  
3. Use jumper wires to connect the ground pins of the first amplifier and each  
successive amplifier.  
Extron  
Extron  
VCM 100 AAP  
MPA 401  
daisy chain  
REMOTE  
REMOTE  
10V 50mA  
REMOTE  
10V 50mA  
VOL/MUTE  
10V  
10V  
50mA  
V
C
G
V
C
G
V
C
G
OR  
VOL/MUTE  
10V 50mA  
VOL/MUTE  
10V 50mA  
VOL/MUTE  
10V 50mA  
Figure 5. Regulating Multiple Amplifiers with a Single Volume Controller  
NOTE: The 10V pin of the volume controller connects to the first MPA 401 only.  
There are no jumper wires linking it to subsequent amplifiers.  
MPA 401-70V and MPA 401-100V • Rear Panel and Cabling  
8
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Speaker Connections  
100V OUTPUT  
OUTPUT  
100V  
f Speaker receptacle (see figure 2) — Connect  
the speakers to the speaker receptacle using the  
2-pole, 5 mm screw-lock captive screw connector  
(MPA 401-100V shown at right).  
CLASS 2 WIRING  
NOTES:  
The mono audio speaker receptacle may be labeled in one of two ways (see  
the diagrams above). The wiring and function are the same whichever way the  
product is labeled.  
The MPA 401 amplifier sums the left and right signals from both the TRS and  
RCA inputs to form Sum 1. Sum 1 is then weighted. At the same time, the  
amplifier sums the left and right signals from the captive screw input to form  
Sum 2. Sum 1 and Sum 2 are then summed together to form a single mono  
signal. See figure 6 below for more details.  
The captive screw, RCA and TRS inputs are buffered.  
L
RCA  
R
+
Sum 1  
+
+
+
L
3.5 mm  
TRS  
R
Amp Stage  
+
+
+
-
L
Sum 2  
Captive  
Screw  
+
-
R
Figure 6. Summing MPA 410 input signals to form a single mono output signal  
The MPA 401-70V provides up to 40 W for a 70 V line distributed sound system; the  
MPA 401-100V provides up to 40 W for a 100 V line distributed sound system.  
See the attention and the note on page 6 for important information about  
connecting wires to captive screw connectors.  
ATTENTION: Do not ground or short the speaker outputs as this will damage  
the amplifier.  
MPA 401-70V and MPA 401-100V • Rear Panel and Cabling  
9
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Setup and  
Operation  
This section provides information about the front panel features and operation of the  
MPA 401-70V and MPA 401-100V:  
Troubleshooting  
Front Panel Features  
The front panels of the MPA 401-70V and MPA 401-100V are identical and shown below:  
2
LEVEL  
BASS  
TREBLE  
1
MPA 401  
MINI POWER AMPLIFIER  
Figure 7.  
MPA 401-70V or MPA 401-100V Front Panel  
a Power LED — The LED lights green when the MPA 401 unit is receiving power and  
active. It lights amber when the unit is on standby.  
b Potentiometers — These three front panel potentiometers are used to optimize  
level, bass, and treble settings (see the following pages for further details).  
MPA 401-70V and MPA 401-100V • Setup and Operation  
10  
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Setting Input Level  
LEVEL  
BASS  
TREBLE  
Adjust the input level as follows:  
1. If necessary, unplug the remote connector from the  
MPA 401  
MINI POWER AMPLIFIER  
unit.  
2. If connecting the amplifier to a system with adjustable  
volume, set the volume to its lowest point. Then adjust the 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 amplifier 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 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.  
NOTE: Turning the bass or treble potentiometers counterclockwise 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.  
MPA 401-70V and MPA 401-100V • Setup and Operation  
11  
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Remote Control Options  
Extron  
Extron  
VCM 100 AAP  
Volume/Mute Controller  
SI 3CT LP  
Full-Range  
Ceiling Speakers  
a
MUTE  
LUME  
O
V
VCM 100 AAP  
Extron  
b MLC 104 IP Plus  
Controller  
Y
A
L
DISP  
F
OF  
A
401-100V  
MP  
N
O
T
PU  
E
LUM  
O
V
100V  
O
U
T
G
CONFI  
T
A
50m  
E
REMO  
/  
10V  
I
104 IP  
MLC  
CLASS WIRING  
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ED)  
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INPUT  
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12V  
1.5A MA  
Extron  
MPA 401  
Mini Power  
Ampliꢀer  
RS-232  
N
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B
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-Y  
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P
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-Y  
ID  
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-Y  
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,Y  
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INPUTS  
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Extron  
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DVS 304 DVI AD  
Digital Video  
Scaler  
Flat Panel  
Display  
(DVI)  
Audio  
with Audio  
R
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IV  
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C
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R
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B
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Laptop  
(RGB)  
VCR  
(Video)  
DVD  
(Component)  
DSS Receiver  
(S-video)  
Figure 8. MPA 401 Remote Control Options  
1. Extron VCM 100 AAP volume and mute control — For a system designed to  
control the volume of the amplifier directly, use a 10k Ohm potentiometer to control  
volume via the remote port on the amplifier. Follow the instructions in the product  
guide.  
2. Using a MediaLink Controller — For a system with variable audio output, connect  
the audio output to the audio input of the amplifier. In the above example, a MediaLink  
controller adjusts the audio volume via a network connection. Follow the instructions  
in the product guide.  
MPA 401-70V and MPA 401-100V • Setup and Operation  
12  
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Troubleshooting  
Under different circumstances, the front panel LED lights green or amber, which provides  
diagnostic information.  
Amplifier Fails to Exit Standby Mode Promptly  
Power LED Problem Description  
Problem Solution  
Color  
No input detected: verify that there is an  
input signal.  
Amber  
No output signal.  
If a signal is present, raise the input level.  
The amplifier is in standby mode and the  
output has been turned off. Check the  
remote port.  
The input signal may be too weak. Raise  
Green or  
Amber  
Slow to exit standby  
mode when a signal is  
present.  
the input level.  
Amplifier Enters Standby Mode Too Early  
Power LED Problem Description  
Color  
Problem Solution  
The input signal may be too weak. Raise  
Green or  
Amber  
Enters standby mode  
early.  
the input level.  
MPA 401-70V and MPA 401-100V • Setup and Operation  
13  
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Reference  
Material  
This section of the user guide contains information about Mounting the MPA 401.  
Mounting  
Plenum Placement  
The MPA 401-70V and MPA 401-100V amplifiers meet UL 2043 requirements for heat  
and smoke release. They can be installed in the ceiling, out of sight, with reduced risk of  
theft.  
ATTENTION: 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. The DC power cord provided with  
the unit is not plenum rated.  
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 these products 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 and MPA 401-100V • Reference Material  
14  
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ATTENTION: Use only the two holes indicated in figure 9 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.  
#4-40 Thread Thru  
Rack Mounting  
3.70"  
(9.39 cm)  
#4-40 Thread Thru  
Rack Mounting  
4.44"  
(11.29 cm)  
Figure 9. Points for Securing the Base of the MPA 401 to a Rack  
Rack Mounting Procedure  
To mount the amplifier on a rack shelf, follow the instructions provided with the shelf  
accessories.  
Under-desk, Through-desk, and Projector Mounting  
The amplifier can be mounted under or through a desk, or above a projector. For the  
appropriate mounting kit, see www.extron.com. Follow the instructions provided with  
each kit.  
MPA 401-70V and MPA 401-100V • Reference Material  
15  
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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  
1230 South Lewis Street  
Anaheim, CA 92805  
U.S.A.  
Japan:  
Extron Electronics, Japan  
Kyodo Building, 16 Ichibancho  
Chiyoda-ku, Tokyo 102-0082  
Japan  
Europe and Africa:  
Extron Europe  
Hanzeboulevard 10  
3825 PH Amersfoort  
The Netherlands  
China:  
Extron China  
686 Ronghua Road  
Songjiang District  
Shanghai 201611  
China  
Asia:  
Middle East:  
Extron Electronics Asia Pte. Ltd.  
135 Joo Seng Road, #04-01  
PM Industrial Bldg.  
Singapore 368363  
Singapore  
Extron Middle East  
Dubai Airport Free Zone  
F12, PO Box 293666  
United Arab Emirates, Dubai  
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 if modifications were made to the product that were not  
authorized by Extron.  
NOTE: If a product is defective, please call Extron and ask for an Application Engineer to receive an RA (Return  
Authorization) number. This will begin the repair process.  
USA:  
Asia:  
714.491.1500 or 800.633.9876  
65.6383.4400  
Europe: 31.33.453.4040  
Japan: 81.3.3511.7655  
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.  
Extron Asia  
Extron India  
Extron Headquarters  
Extron Europe  
Extron Japan  
Extron China  
Extron Middle East  
Extron Korea  
+65.6383.4400  
+65.6383.4664 FAX  
1800.3070.3777  
(Inside India Only)  
+1.800.633.9876 (Inside USA/Canada Only)  
+800.3987.6673  
(Inside Europe Only)  
+81.3.3511.7655  
+81.3.3511.7656 FAX  
+86.21.3760.1568  
+86.21.3760.1566 FAX  
+971.4.299.1800  
+971.4.299.1880 FAX  
+82.2.3444.1571  
+82.2.3444.1575 FAX  
Extron USA - West  
+1.714.491.1500  
Extron USA - East  
+1.919.850.1000  
+91.80.3055.3777  
+31.33.453.4040  
+91.80.3055.3737 FAX  
+1.714.491.1517 FAX  
+1.919.850.1001 FAX  
+31.33.453.4050 FAX  
© 2013 Extron Electronics All rights reserved. www.extron.com  
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