Operation, cont’d

Step 1: Strip and insert the speaker wires into the connector and

tighten the captive screws. Be sure to observe correct polarity.

Do not tin the wires!

Remote volume control

Options for remote control of the XPA amplifiers include the Extron VCM 100 and VC 50 volume controllers. Third party 10k

potentiometer volume controllers can also be connected to this port.

As shown in the following illustration, the XPA's pin 1 is 10 VDC reference voltage. Pin 2 is volume control DC voltage, range is 0 to 10 V, where 0 V is mute and 10 V provides maximum volume. Pin 3 is ground.

NAll nominal levels are at ±10%.

Step 2: Insert the wired connector into the amplifier output and secure the locking screws on either side.

OUTPUT 70V

Red

Black

REMOTEGround

10V 50 mA

VOL/MUTE

1

2

3

4

5

STANDBY

VOL/ MUTE 10V

Extron STP 22

Cable

H

High pass filter toggle switch — Use a Tweeker or small

 

screwdriver to toggle this recessed two-position toggle switch

 

that alternates between Off and 80Hz. Setting the switch to

 

80 Hz prevents the saturation of 70V/100V speaker input

 

transformers by low frequency signals. Saturation may result in

 

undesired overheating of the speaker transformers.

NFiltering may be unnecessary if filtering is applied to the

source input signal upstream of the amplifier.

VOLUME

MUTE

VCM 100

Pinout diagram for VCM 100 MAAP connection to XPA's remote connector

Bridged mono output

The power output of the XPA 1002 can be effectively doubled by bridging the output. Bridging allows power to be output at 200 watts @ 8 ohms or 120 watts @ 16 ohms.

NThe bridging instructions that follow apply only to the XPA 1002 model.

NThe minimum load impedance when bridging is 8 ohms.

To bridge the output, follow the steps and refer to the diagram below:

1. Unplug the IEC power cord from the power amplifier.

2. Wire the output as shown in the following diagram.

3-10 XTRA Series • Operation

XTRA Series • Operation 3-11

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Extron electronic XPA 200170V, XTRA SERIES, XPA 2001100V, XPA 1002 user manual Remote volume control, Bridged mono output

XPA 1002, XPA 2001100V, XPA 200170V, XTRA SERIES specifications

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