Extron Electronics XTRA Series - Manual (Page 25)

Bridged Mono Output
The power output of the XPA 1002 and XPA 1002 Plus can be effectively doubled by
bridging the output. Bridging allows power to be output in mono at 200 watts at 8 ohms.
NOTES:
• The bridging instructions that follow apply only to the XPA 1002 series.
• The 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. Fully attenuate the potentiometer.
3. Wire the output as shown in the following diagram.
4. Wire the input as shown in the following diagram.
5. Connect the IEC power cord and power up the amplifier.
6. Adjust the input levels of channels 1 and 2 identically.
NOTE: See
d
(Attenuation) of Rear Panel Features and Operation on page
12 for more details.
100-240V 0.5A, 50-60Hz XPA 1002
1 2
LIMITER/PROTECT
SIGNAL 0 2
4
6 8 10 12
18
14
26 ∞ 0 2
4
6 8 10 12
14
∞
2 1
ATTENUATION 8Ω / 4Ω OUTPUTS REMOTE INPUTS
1 2
G
1 2 10V 50mA
ST ANDBY
1
2
1
2
1
2
Levels should be set
identically.
Input
Balanced Wiring
From
Mono
Source
From
Mono
Source
To 8 Ohm Minimum
Speaker Load
3.5 mm
Captive Screw
5 mm
Captive Screw
Un-Balanced Wiring
Amplified
Output
NOTE: During bridged mono output, the + output
from channel 1 becomes the positive terminal and
ATTENTION: Failure to follow these instructions may result in damage to the unit.
Electrostatic discharge (ESD) can damage IC chips even though you cannot feel it. You must be electrically grounded before touching anything inside the XPA. A grounding wrist strap is recommended.
the + output from channel 2 becomes the
negative terminal
Figure 10. Bridging the Output of the XPA 1002 Series
XTRA Series Half-Rack Audio Power Amplifiers • Operation 19