Extron electronics MPA 152 MD Manuale utente

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).

To install and set up an MPA 152 MD, follow these steps:

1. Turn all of the equipment off and disconnect it from power sources.

2. Attach the four rubber feet (provided) and place the MPA 152 MD in a

suitable location.

3. Attach the speakers to the MPA 152 MD (see the ﬁgure at right).

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:

• One pair RCA connectors (unbalanced)

• One 3.5 mm stereo tip-ring-sleeve connector (unbalanced)

• One 3.5 mm, 5-pole captive screw (balanced/unbalanced)

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.

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).

BASSLEVEL TREBLE

MINI POWER AMPLIFIER

MPA 152 MD

a. If connecting the ampliﬁer to a projector, set the projector volume to its lowest point.

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.

68-1989-50

Rev A

11 10

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Balanced audio

Tip

Ring

Tip

Ring

Sleeves

Unbalanced audio

Tip

Sleeve

Tip

Captive Screw Connector

Tip (+)

Sleeve ( )

RCA Connector

Sleeve ( )

Ring (R)

Tip (L)

3.5 mm TRS Connector

OUTPUT

4/8

OHMS

Power Receptacle

POWER

12V

3A MAX

SECTION A–A

Power Supply

Output Cord

2-Pole Captive Screw

Connector

Ridges

Smooth

Tie Wrap

3/16”

(5 mm) Max.

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