Extron electronic XPA 2004, XPA 2002 Outputs and may damage the amplifier, Bridge mode XPA, Ohm

HPF

CH 1 CH 2

80 Hz 80 Hz

OFF OFF

XPA 2002-70V

XTRA Full Rack Series • Setup Guide, cont’d

WARNING: Do not short the “+” and “_” outputs to each other. Doing so will short the

outputs and may damage the amplifier.

For complete wiring details, see “Rear Panel Features and Operation” in the user guide.

5.Bridge outputs (XPA 2002, XPA 2004) — Bridging the output of input 1 (for the XPA 2002) or inputs 1 and 3 (for the XPA 2004) doubles the output of those inputs. See

“Bridged mode output” in the user guide for further details.

Bridge mode: XPA 2002

Bridging takes the signal from input 1 and outputs the combined output of 400 watts from the + terminals of output channels 1 and 2. Toggle the bridged output mode switch up (bridged) or down (unbridged). See the diagram at right.

Bridge mode: XPA 2004

Bridging takes the signal from input 1 or input 3 or both and outputs the combined output of 400 watts from the

+terminals of output channels 1 and 2 (Bridge A), or output channels 3 and 4 (Bridge B), or both. Toggle the bridged output mode switch up (bridged) or down (unbridged) for the appropriate input channel. See the diagram at right.

BRIDGE		BRIDGE A
MODE
A		1	2
ON
OFF	8	/ 4	(BRIDGE 8 ONLY)

8 Ohm

NOTE: When bridging outputs, the minimum load impedance is 8 ohms.

6.Reconnect all power cords and switch on all other equipment before powering up the power amplifier. The amplifier must be powered up last. The front panel LED of the amplifier should light green.

7.Adjust the audio level using the rear panel adjustment screws, shown at right.

	1			2			3			4
12	10	8	12	10	8	12	10	8	12	10	8
14		614			6 14			6 14			6
18		4			4			4			4

8. Set the high pass filter — Use a small	26	2	2
screwdriver to toggle this switch between off		0	0

(no filtering) and 80 Hz. The XPA 2002-70V has two switches, one for each output channel. The

XPA 2003C-70V has one switch for the 70V line distribution output channel (channel 3). Setting the switch to 80 Hz prevents the saturation of 70V speaker input transformers by low frequency signals.

9. If desired, wire a contact closure device to the remote standby connector. Connecting pin 2 to ground (pin 1) places the amplifier in standby mode. Standby mode

turns off all outputs, although the amplifier is still receiving power.

Use the included 2-pin, 3.5 mm captive screw connector to jumper the pins.

2 2

00

HPF

CH 3 80 Hz

OFF

XPA 2003C-70V

To Contact Closure Port on Control Device

STANDBY

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						68-783-50 Rev B
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