Extron electronics MPA 152 Plus Manuel utilisateur

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

Balanced Stereo Input

Tip

Ring

Tip

Ring

Sleeves

Unbalanced Stereo Input

Tip

Slee

Tip

Unbalanced Mono Input

Tip

Sleeve

CLASS 2

WIRING

OUTPUT

INPUTS

1 32

Tip (+)

Sleeve ( )

RCA Connector

Sleeve ( )

Ring (R)

Tip (L)

3.5 mm TRS Connector

Extron

CONFIG

DISPLAY

VOLUME

OFF

MLC 104 IP PLUS

VIDEO

AUX

VIDEO

IMAGE

MUTE

POWER

12V

0.7AMAX

CLASS2

WIRING

V C G

10V 50mA

MPA152 PLUS

INPUTS

OUTPUT REMOTE

Extron

MPA 152 Plus

Mini Power

Amplier

RGBHV

S-Video

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

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 +1.919.850.1001 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

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

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

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