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 right channel is handled in the same way.

The left and right channels are then sent to the output amplifiers in one of two ways, depending on how the

 

 

STEREO

 

 

front panel switch is set (see the diagram to the right).

 

 

 

zz Stereo: The left and right channels are sent to the left and right output amplifers respectively.

 

 

DUAL

zz Dual Mono: The left and right channels are summed and then the resulting mono signal is fed to both of

 

 

 

 

MONO

 

the output amplifiers.

 

 

 

NOTE: The captive screw, RCA and TRS inputs are buffered.

5. Connect the pre-wired captive screw connector to one of the 2-pole,

 

PS 1220

3.5 mm captive screw outlets on the provided power supply and the

 

MPA 152 Plus

Power Supply

other end into the power receptacle on the amplifier (see the figure

 

to the right). The power cord connectors are correctly wired when

Amplifier

 

POWER

DC Power

shipped. The MPA 152 Plus ships with a 24 W desktop power supply.

12V

Outputs

0.7A MAX

 

Power

AC Power Cord

 

 

ATTENTION:

Receptacle

 

 

 

See the attention notices in the Power Input section of the

 

DO NOT USE

MPA 152 Plus Series User Guide for important information

DC Power Cord

 

about using power supplies.

Captive Screw

Captive Screw

Connector

Connector

When the power supply is connected to the MPA 152 Plus, it

 

Tie

must not be shared with any other devices.

Power Supply

Wrap

Output Cord

 

6.Adjust the MPA 152 Plus input level, bass, and treble from the front panel (see figure at right).

a.If necessary, unplug the remote connector from the unit (see step 7, below).

b.If connecting the amplifier 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.

LEVEL BASS TREBLE

MPA 152 PLUS

MINI POWER AMPLIFIER

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 first 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 amplifier 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).

 

 

 

REM

V

C

G

E

 

10V

 

50mA

 

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68-1320-52

 

 

 

 

 

 

 

 

Rev A 06 13

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Extron electronic MPA 152 PLUS setup guide MPA 152 Plus Setup Guide Cont’d, Dual