Setting Bass and Treble
Adjust the MPA 152 Plus bass and treble as follows:
1. Use the Bass potentiometer to increase or decrease the bass shelving ±10 dB at 80 Hz
and below.
2. Use the Treble potentiometer to increase or decrease the treble shelving ±10 dB at
10kHz 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 in the center, flat response is achieved.
Remote Control Options
POWER
12V
0.7A MAX
4
Ω
8
Ω
CLASS 2
WIRING
L
R
L
R
VCG
10V 50mA
L
MPA 152 Plus
R
/
INPUTS
OUTPUT REMOTE
PC
Projector
8 ohm Ceiling
Speakers
in Parallel
VGA w/
Audio Cable
VCR
Composite
Audio RCA
Variable
Audio
Output
ComLink
IR Remote
Extron
MLC 104 IP
Controller
Extron
VCM 100 AAP
Volume/Mute Contr
Extron
MPA 152 Plus
Mini Power Amplifier
1
2
3
CONFIG
PROJECTOR
VOLUME
MLC 104 IP
1
2
3
4
ON
OFF
MUTE
VOLUME
VCM 100 AAP
DVD
S-video
Audio RCA
Figure 9. Typical Application for the MPA 152 Plus, Using Remote Control
a
Using the IR remote for the projector — When using a projector with variable audio
outputs, connect the projector audio output to the MPA 152 Plus audio input. Use
the IR remote for the projector to control the volume of the projector, which effectively
controls the volume of the MPA 152 Plus.
b
Extron volume controllers — Extron provides a range of volume and mute controllers
for use with a projector that lacks variable audio outputs. These options control the
MPA 152 Plus volume directly (see Wiring for remote control on page 7).
c
Using a MediaLink Controller — For a projector with variable audio output, connect
the projector audio output to the MPA 152 Plus audio input. Use a MediaLink controller
to adjust the volume of the projector via RS‑232. MediaLink controllers can also use the
IR remote to adjust the volume of the projector and, thus, the input to the amplifier.
MPA 152 Plus • Setup and Operation 11
