Extron electronics MPA 152 Plus User manual

1
MPA 152 Plus • Setup Guide
The Extron MPA 152 Plus is an ENERGY STAR®qualied
mini power amplier. It delivers up to 15watts (rms) per
channel stereo or dual mono into a 4ohm sound system,
or 8 watts (rms) per channel into an 8ohm system.
For complete instructions, see the MPA 152 Plus User
Guide, which is available at www.extron.com.
Installation
To install and set up an MPA 152 Plus, follow these steps:
1. Turn off all equipment and disconnect from power
sources.
2. Mount the Extron MPA 152 Plus on a rack, under a
desk, or on a projector pole.
ATTENTION: Although the amplier 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
amplier must be plenum rated.
NOTE: Use only the two round mounting holes for mounting the MPA 152 Plus. The other four (hexagonal) holes anchor
stand‑offs for the internal circuit boards. Using them may damage the amplier and does not provide secure mounting
for the unit.
3. Attach the speakers to the MPA 152 Plus output, using the 4‑pole,
5mmcaptive screw receptacle (see the gure at right).
ATTENTION: Do not ground or short the speaker outputs as this will
damage the amplier.
4. Attach inputs to the MPA 152 Plus unit from the audio source, the
projector, or both. There are three audio inputs (shown in the gure at
right), which can be used individually or together.
a One pair of RCA 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 receptacle. If unused, the receptacles automatically terminate to lower the
noise oor.
b One 3.5 mm stereo tip-ring-sleeve 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 oor.
c One 3.5 mm, 5-pole captive screw receptacle — this 5‑pole 3.5 mm captive screw receptacle
accepts line level, balanced or unbalanced, mono or stereo audio signals.
Balanced Mono Input
Tip
Ring
Sleeve
LR
Balanced Stereo Input
Tip
Ring
Tip
Ring
Sleeves
LR
Unbalanced Stereo Input
Tip
Slee
ve
Slee
ve
Tip
LR
Unbalanced Mono Input
Tip
Sleeve
LR
4 Ω 8 Ω
CLASS 2
WIRING
LR
/
OUTPUT
LR
LR
INPUTS
1 32
Tip (+)
Sleeve ( )
RCA Connector
Sleeve ( )
Ring (R)
Tip (L)
3.5 mm TRS Connector
Extron
CONFIG
DISPLAY
VOLUME
1
2
3
4
ON
OFF
MLC 104 IP PLUS
VIDEO
AUX
VIDEO
PC
IMAGE
MUTE
POWER
12V
0.7AMAX
4
Ω
8
Ω
CLASS2
WIRING
LR
LR
V C G
10V 50mA
L
MPA152 PLUS
R
/
INPUTS
OUTPUT REMOTE
Extron
MPA 152 Plus
Mini Power
Amplier
RGBHV
S-Video
Audio
Audio
Audio
Audio
Video
DVD/VCR
Combo
Laptop
Projector
RS-232 or
IR Projector
control Extron
MLC 104 IP Plus
MediaLinkController
with IP Link
Extron
SM 3
Full-range
Speakers

2
MPA 152 Plus • Setup Guide (Cont’d)
Extron Headquarters
+1.800.633.9876 (Inside USA/Canada Only)
Extron USA - West Extron USA - East
+1.714.491.1500 +1.919.850.1000
+1.714.491.1517 FAX [phone] FAX
Extron Europe
+800.3987.6673
(Inside Europe Only)
+31.33.453.4040
+31.33.453.4050 FAX
Extron Asia
+65.6383.4400
+65.6383.4664 FAX
Extron Japan
+81.3.3511.7655
+81.3.3511.7656 FAX
Extron China
+86.21.3760.1568
+86.21.3760.1566 FAX
Extron Middle East
+971.4.299.1800
+971.4.299.1880 FAX
Extron Korea
+82.2.3444.1571
+82.2.3444.1575 FAX
Extron India
1800.3070.3777
(Inside India Only)
+91.80.3055.3777
+91.80.3055.3737 FAX
© 2013 Extron Electronics All rights reserved. www.extron.com 68‑1320‑52
Rev A 06 13
The MPA 152 Plus sums and weights the left unbalanced signals from the TRS and RCA receptacles. This summed,
unbalanced signal is then summed with the left balanced signal from the captive screw receptacle. The right channel is
handled in the same way.
The left and right channels are then sent to the output ampliers in one of two ways, depending on how the
front panel switch is set (see the diagram to the right).
zStereo: The left and right channels are sent to the left and right output amplifers respectively.
zDual Mono: The left and right channels are summed and then the resulting mono signal is fed to both of
the output ampliers.
NOTE: The captive screw, RCA and TRS inputs are buffered.
5. Connect the pre‑wired captive screw connector to one of the 2‑pole,
3.5 mm captive screw outlets on the provided power supply and the
other end into the power receptacle on the amplier (see the gure
to the right). The power cord connectors are correctly wired when
shipped. The MPA152 Plus ships with a 24 W desktop power supply.
ATTENTION:
• See the attention notices in the Power Input section of the
MPA152 Plus Series User Guide for important information
about using power supplies.
• When the power supply is connected to the MPA152Plus, it
must not be shared with any other devices.
6. Adjust the MPA 152 Plus input level, bass, and treble from the front panel (see gure at right).
a. If necessary, unplug the remote connector from the unit (see step 7, below).
b. If connecting the amplier to a system with adjustable volume, set the system volume
to its lowest point. Then adjust the MPA152 Plus front panel level potentiometer fully
counterclockwise.
c. Set the system volume to its maximum volume level (no sound should come out).
d. Return to the MPA 152 Plus and raise the level until sound distortion rst occurs, then lower slightly until the distortion
disappears. This setting ensures that, whatever the system volume setting may be, no clipping occurs.
e. Adjust bass and treble to preference.
7. The rear panel 3‑pole Remote captive screw port on the amplier can be used for remote control of the
volume by an Extron volume controller such as an Extron VCM100 AAP, VC 50, or MLA VC10 Plus. A
MediaLink controller can also adjust the audio volume via a network connection or by IR remote (see the
MPA 152 Plus Series User Guide).
Power
Receptacle
DC Power Cord
Captive Screw
Connector
MPA 152 Plus
Amplifier
DC Power
Outputs
DO NOT USE
AC Power Cord
Tie
Wrap
Captive Scre
w
Connector
Power Supply
Output Cord
PS 1220
Power Supply
POWER
12V
0.7A MAX
VCG
10V50mA
REMOTE
BASSLEVEL TREBLE
MINI POWER AMPLIFIER
MPA 152 PLUS
STEREO
DUAL
MONO