Bridging (8 Ohm/4 Ohm Outputs Only) - Extron electronics NetPA Ultra Series User Manual

Bridging (8 ohm/4 ohm outputs only)

NOTE: During bridged mono output, the + output from the odd channel becomes the
positive terminal and the + output from the even channel becomes negative.
The output power to a speaker can be doubled by bridging the output.
NOTE: Bridging is only available on the NetPA U 1002/1004 low-impedance models.
The minimum load impedance when bridging is 8 ohms.
To bridge the output, follow the steps and refer to the following diagrams:
1. Connect the IEC power cord and power up the amplifier.
Do not plug in any inputs yet.
2. Configure the amplifier.
a. Determine the amplified output pair that is used for bridging: 1&2 (NetPA U 1002 or
1004) or 3&4 (NetPA U 1004 only).
b. Determine the input or inputs feeding the output.
c.
Route the input or inputs to both outputs.
The gain and mute should be the same for each mix point from each input to each
output.
Figure 20.
d. Configure the amplified output pair. Each channel of the output pair must be
configured similarly
i.
ii.
iii.
Matching Gain and Mute
Configure the trim, delay, filter, dynamics, and attenuator block for the odd
channel.
.
Figure 21. Accessing Amplifier Output Block Panel
Copy and paste the configuration of the odd channel to the even channel.
Open the attenuator block of the even channel and click the polarity box to
invert the signal (see figure 22
change from '+' to '-' and its color should change to yellow.
on the next page). The sign on the box should
NetPA Ultra Series • Operation 22