Bridge-Mono Operation; Bridge-Mono Wiring - Crown Macro-Tech MA-5000VZ Reference Manual

Macro-Tech 5000VZ Power Amplifier
Note: A method for paralleling multiple amplifiers for
fail-safe redundancy is available from Crown's Techni-
cal Support Group.

3.3.2 Bridge-Mono Operation

Bridge-Mono mode is intended for driving loads with a
total impedance of 4 ohms or more (see Section 3.3.3 if
the load is less than 4 ohms). Installing the amplifier in
Bridge-Mono mode is different from the other modes
and requires special attention.
To activate Bridge-Mono mode, turn the amplifier off,
wait at least 10 seconds, and then slide the stereo/
mono switch to the BRIDGE MONO position. Both out-
puts receive the signal from the Channel 1 input, with
output Channel 2 inverted so it can be bridged with the
Channel 1 output.
Reference Manual
Note: The Channel 2 input jack and level control are
disconnected in Bridge-Mono mode. A signal feeding
Channel 2 will have no effect on the output.
Connect the load across the Channel 1 and 2 positive
(+) terminals attaching the positive lead from the load
to Channel 1 and the negative lead from the load to
Channel 2 as shown in Figure 3.5. The negative (–) ter-
minals are not used and should not be shorted. In ad-
dition, the connected load must be balanced (neither
side connected to ground).
CAUTION: Be certain that every device connected
to the Bridge-Mono output is balanced (not ground
referenced). If the input signal ground is not fully
isolated, connecting an output lead to ground may
cause oscillations.
Fig. 3.5 Bridge-Mono Wiring
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