Extron electronic Stereo Amplifier MPA 152 MD User Manual

MPA 152 MD • Setup Guide  
THE MPA 152 MD IS AN ACCESSORY TO A MEDICAL SYSTEM.  
The Extron® MPA 152 MD mini power amplifier 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 MD User Guide, which is available on  
the Extron website (www.extron.com).  
OUTPUT  
To install and set up an MPA 152 MD, follow these steps:  
4/8  
OHMS  
1. Turn all of the equipment off and disconnect it from power sources.  
L
R
Tip (L)  
2. Attach the four rubber feet (provided) and place the MPA 152 MD in a  
Ring (R)  
Tip (+)  
suitable location.  
3. Attach the speakers to the MPA 152 MD (see the figure at right).  
Sleeve (  
)
Sleeve (  
)
4. Attach inputs to the MPA 152 MD unit from the audio source, the  
projector, or both. There are three audio inputs (shown in the figure at  
right), which can be used individually or together:  
RCA Connector  
3.5 mm TRS Connector  
One pair RCA connectors (unbalanced)  
Tip  
Tip  
Ring  
Sleeves  
Tip  
Ring  
Sleeve  
One 3.5 mm stereo tip-ring-sleeve connector (unbalanced)  
One 3.5 mm, 5-pole captive screw (balanced/unbalanced)  
Tip  
Sleeve  
Balanced audio  
Unbalanced audio  
Captive Screw Connector  
NOTE: The MPA 152 MD amplifier mixes all right channel  
inputs to a single signal and all left channel inputs to  
a second signal. The user may output these signals as  
stereo or sum them to produce a dual mono signal.  
POWER  
Power Receptacle  
5. Connect power cords to the MPA 152 MD and other audio equipment.  
6. Adjust the MPA 152 MD input level, bass, and treble (see the figure below).  
12V  
3A MAX  
2-Pole Captive Screw  
Connector  
LEVEL  
BASS  
TREBLE  
MPA 152 MD  
MINI POWER AMPLIFIER  
a. If connecting the amplifier to a projector, set the projector volume to its lowest point.  
Tie Wrap  
Then adjust the MPA 152 MD level potentiometer fully counterclockwise.  
b. Set the projector volume to its maximum volume level (no sound should come out).  
c. Return to the MPA 152 MD and raise the level until sound distortion first occurs, then lower slightly until the  
distortion disappears. This setting ensures that, whatever the projector volume setting may be, no clipping occurs.  
d. Adjust bass and treble to preference.  
7. The 3-pole Remote captive screw connector on the MPA 152 MD is used for remote control of the volume when using a  
third party remote control option with a projector that lacks variable audio outputs. The volume can also be controlled  
by IR remote control of the projector volume (see the MPA 152 MD User Guide).  
CAUTION: All accessory equipment must be UL-listed. For more information, see the "MPA 152 MD Application  
Notes" section, in the MPA 152 MD User Guide.  
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© 2010 Extron Electronics. All Rights Reserved. www.extron.com  
 

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