Viola Symphony Manual Rev 1
8 of 15
9
th
September 2005
Figure 2. Bi-wire connection.
Note:
Bi-wireable speakers are often shipped with links between the inputs to the
two sections of the cross-over. Ensure that these links are removed, or the benefits
of bi-wiring will not be realized.
BRIDGE CONNECTION
The two channels of the Symphony may be connected in what is called “Bridge
Connection” to form a mono amplifier that can deliver approximately 4 times the
output power of the individual channels. This allows the Symphony to be converted
from a stereo power amplifier that can deliver 200W per channel into 8 ohms, into a
mono power amplifier that can deliver 800W into 8 ohms.
This works by feeding the input signal directly into one channel whilst feeding an
anti-phase version of the same signal to the input of the other channel. The speaker
is connected between the High terminals of the two outputs.
Producing the anti-phase signal for the second channel is easy as the input
connectors of each channel are wired in parallel. It simply involves connecting a
cable from the unused input connector of the first channel to either input of the
second channel. The anti-phase signal is produced by wiring the cable so that the
connection between pins 2 and 3 either connector on this cable are swapped over.
Suitable cables may be obtained from your VIOLA dealer, or directly from VIOLA.
The following instructions are for the most common case where the main input is
connected to the XLR input of the first channel.
-
+
Symphony
Speaker
H
H
L
L
L
H
RED
BLACK
+
-
