Bridged Mono Output (8 Ohm/4 Ohm Outputs Only) - Extron electronics XPA Ultra Series User Manual

Bridged Mono Output (8 ohm/4 ohm outputs only)

The power output to a speaker can be doubled by bridging the output.
NOTE: The minimum load impedance when bridging is 8 ohms.
To bridge the output, follow these steps and refer to the diagram below:
1.
Unplug the IEC power cord from the power amplifier.
2. Fully attenuate the potentiometers.
3. Wire the output as shown in figure 20 below.
4. Wire the input as shown in figure 20 below.
5. Connect the IEC power cord and power up the amplifier.
6. Adjust the input levels of channel pair identically (see in figure 15,
Balanced Wiring
From
Mono
Source
Un-Balanced Wiring
From
Mono
Source
To 8/16 Ohm
Speaker Load
NOTE: During bridged mono output, the
the positive terminal and the
terminal.
Figure 20.
10 10 10 10
12 8 12 8 12 8 12 8
LIMITER/ 1 2 3
PROTECT 14 6 14 6 14 6 14 6
18 4 4 4 4
26 2 2 2 2
∞ ∞ ∞ ∞
100-240V 0.6A, 50-60 Hz 1 2 3 4 1 0 2 0 3 0 4 0
XPA U 1004 SIGNAL
ATTENUATION INPUTS
Input
Set levels identically
per channel pair.
3.5 mm
Captive Screw
1
2
1
2
5 mm
Captive Screw
1
2
output from the even channel becomes the negative
+
Bridging the Output
CLASS 2 WIRING
4 1 2 3 4
STANDBY
G
REMOTE 8Ω/4Ω OUTPUTS
Amplified
Output
output from the odd channel becomes
+
XPA Ultra Series Power Amplifiers • Operation
on page 16).
D
19