Extron Electronics XTRA Full Rack Series User Guide - Manual (Page 21)

XPA 2004 bridged mono output speaker wiring
In bridged mode, the output mode toggle switches for Input 1 (A) or Input 3 (B) or both
must be set to the bridged (up) position, as shown below.
For Input 1: The channel 1 “+” output terminal becomes the bridged:”+” output
terminal and the channel 2 “+” output terminal becomes the bridged “-” output terminal,
as shown below.
For Input 3: The channel 3 “+” output terminal becomes the bridged:”+” output
terminal and the channel 4 “+” output terminal becomes the bridged “-” output terminal,
as shown below.
8 Ohm
Load
8 Ohm
Load
(BRIDGE 8 ONLY)
ON
OFF
A B
1 2
BRIDGE A
3 4
BRIDGE B
OUTPUTS
CLASS 2 WIRING
BRIDGE
MODE
(BRIDGE 8 ONLY) 4 / 8 4 / 8
Mono
–
Mono
+
Mono
–
Mono
+
On the input end, only Input 1 or Input 3 or both are used in bridged mode, as shown
below.
1 2 3
(BRIDGE A) (BRIDGE B)
4
INPUTS
XPA 2004 bridged mono output using parallel speaker wiring
In bridged mode, the output mode toggle switches for Input 1 (A) or Input 3 (B) or both
must be set to the bridged (up) position, as shown below.
The channel 1 “+” output terminal becomes the bridged:”+” output terminal and the
channel 2 “+” output terminal becomes the bridged “-” output terminal, as shown below.
Similarly, the channel 3 “+” output terminal becomes the bridged:”+” output terminal
and the channel 4 “+” output terminal becomes the bridged “-” output terminal, as
shown below.
8 Ohm
Total
Load 8 Ohm
Total
Load
Two 16 ohm speakers wired in parallel equal an 8 ohm load.
(BRIDGE 8 ONLY)
ON
OFF
A B
1 2
BRIDGE A
3 4
BRIDGE B
OUTPUTS
CLASS 2 WIRING
BRIDGE
MODE
(BRIDGE 8 ONLY) 4 / 8 4 / 8
Mono
–
16
ohms 16
ohms
Mono
+
Mono
–
Mono
+
16
ohms 16
ohms
XTRA Full Rack Power Amplifier Series • Operation 16