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.
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.
8. Set the high pass filter — Use a small
screwdriver to toggle this switch between off
(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.
To Contact Closure Port
on Control Device STANDBY
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© 2010 Extron Electronics. All rights reserved. www.extron.com 68-783-50 Rev B
10 10
ON
OFF
A
BRIDGE
MODE
12
BRIDGE A
8 / 4
8 Ohm
(BRIDGE 8 ONLY)
80 Hz
OFF
CH 2
80 Hz
OFF
CH 1
HPF
80 Hz
OFF
CH 3
HPF
XPA 2002-70V XPA 2003C-70V
XTRA Full Rack Series • Setup Guide, cont’d
LEVEL
1 2 3 4
0
2
4
6
8
10
14
18
26
12
0
2
4
6
8
10
14
12
0
2
4
6
8
10
14
12
0
2
4
6
8
10
14
12