Adjusting Levels; Power; Remote Control - Extron electronics MPA 152 Plus Setup Manual

MPA 152 Plus • Setup Guide (Cont'd)
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 same applies to the right channel.
The left and right channels are then sent to the output amplifiers in one of two ways, depending on how the front panel
switch is set (see the diagram to the right).
Stereo: The left and right channels are sent to the left and right output amplifers respectively.
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Dual Mono: The left and right channels are summed and then the resulting mono signal is fed to both of the output
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amplifiers.
NOTE: The captive screw, RCA and TRS inputs are buffered.
Adjust the MPA 152 Plus input LEVEL, BASS, and TREBLE from the front panel (see figure at right).
5.
If necessary, unplug the remote connector from the unit (see step 6, below).
a.
If connecting the amplifier to a system with adjustable volume, set the system volume
b.
to its lowest point. Then adjust the MPA 152 Plus front panel LEVEL potentiometer fully
counterclockwise without using excessive torque.
Set the system volume to its maximum volume level (no sound should come out).
c.
Return to the MPA 152 Plus and raise the LEVEL until sound distortion first occurs, then lower slightly until the distortion
d.
disappears. This setting ensures that, whatever the system volume setting may be, no clipping occurs.
Adjust the BASS and TREBLE potentiometers to preference without using excessive torque.
e.
ATTENTION:
The default position of the LEVEL potentiometer when shipped is turned fully counter‑clockwise (fully attenuated). The
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default position of the BASS and TREBLE potentiometers is 12 o'clock (flat response).
La position par défaut du potentiomètre de niveau lors de son expédition est orientée vers le sens antihoraire
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(atténuation complète). La position par défaut des potentiomètres de graves et d'aigus est 12 h (réponse linéaire).
Do not use a screwdriver to adjust the potentiometers. The potentiometers should only be adjusted as needed using
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the included Extron tweeker (small screwdriver).
Ne pas utiliser de tournevis pour ajuster les potentiomètres. Les potentiomètres doivent uniquement être ajustés
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selon les besoins avec le petit tournevis Extron fourni.
While potentiometer tuning knobs may look like screws, they do not function in the same manner. Use a light touch
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when adjusting to avoid applying excessive torque to the potentiometers.
Bien que les boutons de réglage du potentiomètre ressemblent à des vis, ils n'ont pas la même fonction. Exercez une
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pression légère lors du réglage afin d'éviter un serrage excessif des potentiomètres.
Applying excessive torque can cause mechanical damage to the potentiometer, rendering it inoperable.
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Un serrage excessif peut endommager le potentiomètre, le rendant inutilisable.
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The MPA 152 Plus ships with a 24 W desktop power supply.
The power cord connectors are correctly wired when shipped.
Connect the pre‑wired captive screw connector to the power
receptacle on the amplifier (see the figure to the right).
To wire the connector yourself, ensure the power cords have
the correct polarity. The ground cord has ridges.
ATTENTION:
See the attention notices in the Power Input section
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of the MPA 152 Plus Series User Guide for important
information about using power supplies.
Reportez‑vous aux précautions d'emploi incluses
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dans la section sur l'entrée d'alimentation du MPA 152
Plus Series User Guide pour des informations
essentielles sur l'utilisation des sources d'alimentation.
The rear panel 3‑pole Remote captive screw port on the amplifier can be used for remote control of the
6.
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).
For information on safety guidelines, regulatory compliances, EMI/EMF compatibility, accessibility, and related topics, see the
Extron Safety and Regulatory Compliance Guide
© 2013‑2020 Extron — All rights reserved.
Worldwide Headquarters: Extron USA West, 1025 E. Ball Road, Anaheim, CA 92805, 800.633.9876
MPA 152 Plus
Amplifier
on the Extron website.
www.extron.com. All trademarks mentioned are the property of their respective owners.
LEVEL

POWER

12V
0.7A MAX
Power
Receptacle
DC Power Cord
Tie
Captive Screw
Wrap
Connector
AC Power Cord
Ground all
Devices
G Ground
+12 VDC input
STEREO
DUAL
MONO
BASS TREBLE
MPA 152 PLUS
MINI POWER AMPLIFIER
POWER
12V
0.7A MAX
Smooth Ridges
A A
Power Supply
Output Cord
SECTION A–A 3/16"
(5 mm) Max.
External Power Supply
(12 VDC, 2.0 A)
V C G
10V 50mA
68-1320-52 Rev. C
12 20