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Bridging Channels
Under typical conditions, for surround-sound or home theatre applications, ther
e
are two channels available for the front loudspeakers, a channel for the cente
r
loudspeaker, a pair of channels for the rear effects, and an extra channel to driv
e
either a subwoofer or a second center channel loudspeaker.
The Perreaux 6160 multi-channel amplifier can be thought of as three stereo
amplifiers built into a single box. Each pair of channels within the unit can b
e
bridged to form a single channel with approximately three times the potentia
l
output of a single channel. This facility allows this 6160 to be used in a numbe
r
of configurations. For example, bridging two of the 6160 pairs of amplifiers
will provide two channels of approximately 425W into 8Ω, suitable for the mai
n
loudspeakers of the system, and two channels of 160W into 8Ω for a remote se
t
of loudspeakers.
Ultimately, two 6160 units both operating with all channels bridged, will offe
r
six channels of high power amplification (6 x 425W into 8Ω) for home theatr
e
applications.
To configure for bridged mode:
àEnsure the power switch on the 6160 is switched to the OFF position
and disconnect unit from mains supply. Allow a minute to discharge
stored potential.
àSelect the pair of channels to be bridged. For this example, we will use
channels 5&6. (Other pairs 1&2 and 3&4 are bridged similarly.)
àDisconnect ALL input and output cables (interconnect cables and
loudspeaker cables) from channels 5&6.
àSet the Bridging Switch to the bridged position. This converts internal
circuitry from normal to bridged mode.
àConnect the loudspeaker cable across the POSITIVE terminals of
channels 5&6 loudspeaker output terminals. When bridging two
channels, the positive loudspeaker terminals of the bridged pair form
the loudspeaker terminals for the bridged channel, i.e. the positive
output terminal of the odd numbered channel becomes the POSITIVE
terminal of the bridged pair; the positive terminal of the even numbered
channel becomes the NEGATIVE terminal of the bridged pair. To
explain further, connect the positive conductor to the positive terminal
of channel 5 and the negative conductor to the positive terminal of
channel 6, i.e. the two red terminals. DO NOT connect any cables to
the black terminals; channel 5 negative terminal (-) and channel 6
negative terminal (-).