Extron electronic setup guide MPA 152 Setup Guide, see the figure at right

MINI POWER AMPLIFIER

MPA 152 • Setup Guide

The Extron MPA 152 is an ENERGY STAR® qualified mini power amplifier. 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 User Guide, which is available at www.extron.com.

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

1.Turn off all equipment off and disconnect from power sources.

2.Mount the Extron MPA 152 on a rack, under a desk, or on a projector pole.

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

4.Attach inputs to the MPA 152 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:

zz One pair RCA connectors (unbalanced)

zz One 3.5 mm stereo tip-ring-sleeve connector (unbalanced) zz One 3.5 mm, 5-pole captive screw (balanced or unbalanced)

OUTPUT

	4/8
	OHMS
L	R

	Tip (L)
Tip (+)	Ring (R)
Sleeve ( )	Sleeve ( )
RCA Connector	3.5 mm TRS Connector

NOTE: The MPA 152 amplifier sums 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 average them to produce a dual mono signal.

Tip		Tip
	L	Sleeve
Ring
Sleeves		Tip
Tip	R
		Sleeve
Ring
Balanced audio		Unbalanced audio

L R

MPA 152	PS 1220 Power Supply
Amplifier
	AC Power Cord
POWER	Power
	Receptacle	DC Power
		Outputs
12V
0.6 A MAX
	DC Power Cord	Captive Screw
	Captive Screw	Connector
	Connector
	Tie
	Wrap
		Power Supply
		Output Cord

Captive Screw Connector

Ensure that the audio output from the projector is set to variable out. Multiple inputs can be used simultaneously and result in audio mixing.

5.Connect power cords to the MPA 152 and other audio equipment.

CAUTION: • See the caution in the Power Input section of the MPA 152 User Guide for important information about using power supplies.

•Ensure the polarity of the wires is correct. The wire with ridges is ground or negative.

6. Adjust the MPA 152 input level, bass, and treble LEVEL	BASS TREBLE
(see the figure at right).	MPA 152

a. If connecting the amplifier to a projector,

set the projector volume to its lowest point. Then adjust the MPA 152 level potentiometer fully counterclockwise.

					b. Set the projector volume to its maximum volume level (no sound
		Projector				should come out).
					c.	Return to the MPA 152 and raise the level until sound distortion
		RS-232 or
		IR Projector	Extron			first occurs, then lower slightly until the distortion disappears. This
		control
			MLC 104 IP Plus			setting ensures that, whatever the projector volume setting may
		Audio	MediaLink Controller
			with IP Link			be, no clipping occurs.
	Audio	Video
	AudioS-Video				d.	Adjust bass and treble to preference.
	Audio	RGBHV
Extron			Laptop
				7.	The 3-pole “Remote” captive screw connector on the MPA 152 is used for
MPA 152
Mini Power	Extron	DVD/VCR			remote control of the volume when using an Extron volume controller
Ampli￿er		Combo			such as an Extron VCM 100 AAP, VC 50, or MLA-VC10 Plus. The volume can
	SM 3
	Full-range				also be controlled by IR remote control of the projector volume (see the
	Speakers
					MPA 152 User Guide).

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