Extron electronics XPA 2002 User 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
On the input end, only Input 1 or Input 3 or both are used in bridged mode, as shown
below.
1
(BRIDGE A)
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
16 16
Total
ohms ohms
Load
+
Mono
BRIDGE
MODE
A B
ON
OFF
8
–
Mono
INPUTS
2 3 4
(BRIDGE B)
+
Mono
CLASS 2 WIRING
BRIDGE OUTPUTS
MODE
BRIDGE A
A B
1 2
ON
OFF
8 / 4 8
(BRIDGE 8 ONLY)
–
Mono
Two 16 ohm speakers wired in parallel equal an 8 ohm load.
XTRA Full Rack Power Amplifier Series • Operation
CLASS 2 WIRING
OUTPUTS
BRIDGE A BRIDGE B
1 2 3 4
/ 4 8 / 4
(BRIDGE 8 ONLY) (BRIDGE 8 ONLY)
+
Mono
BRIDGE B
3 4
/ 4
(BRIDGE 8 ONLY)
–
Mono
+
Mono
8 Ohm
Load
–
Mono
8 Ohm
16 16
ohms ohms
Total
Load
16