Remote Volume Control

HHigh pass filter (HPF) toggle switch (XPA 2001 series) — Use a small screwdriver to toggle this recessed two-position switch. Setting the switch to 80 Hz (default) prevents the saturation of 70 V and 100 V speaker input transformers by low frequency signals. Saturation can result in severe distortion of the speaker output signal.

HPF	HPF
	80 Hz

80 Hz	or
80 Hz
OFF	OFF
	OFF

NOTES:
•	The filter may be safely turned off if high pass filtering is applied to the
	source input signal upstream of the amplifier. Otherwise, it should be left on.
•	The high pass filter toggle switch may be labeled one of two ways. The
	wiring and function are the same, whichever way your product is labeled.

Options for the 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, pin V (1) on the XPA is a 10 VDC reference voltage. Pin C (2) is the volume control DC voltage input. The range is 0 to 10 V, where 0 V is mute and 10 V provides maximum volume. Pin G (3) is ground.

NOTE: All nominal levels are at ±10%.

REMOTE

10V	50mA
	G STANDBY

V C G

Red

Black

orGround

10V 50 mA

VOL/MUTE

STANDBY

Extron

STP 22

Cable

VOL/ MUTE 10V

VOLUME

MUTE

VCM 100

Figure 8. Pinout Diagram for VCM 100 MAAP Connection to XPA Remote Connector

XTRA Series Half-Rack Audio Power Amplifiers • Operation

XTRA SERIES specifications

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