Mpc200 & 200T Bridged Mono Configuration; Mpc300, 300T, 600 & 600T Bridged Mono Configuration; Bridged Mono Speaker Connection - JBL MPC Series Owner's Manual

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Bridged Mono Input Connection—
MPC200 & 200T Bridged Mono Configuration
Channel 1 and channel 2 gain control settings must be set the same!
MPC300, 300T, 600 & 600T Bridged Mono Configuration
SIGNAL CLIP

Bridged Mono Speaker Connection

Low impedance
Audio transformer AUDIO TRANSFORMER
must AUDIO TRANSFORMER
When operating the amplifier in bridged mono mode, neither of the speaker
wires is at ground potential. Grounding either of the speaker wires can short out
one side of the power amplifier. Use the same precautions in handling and
dressing the wire as you would for the normal "hot" outputs. Ensure that neither
wire connects to ground anywhere along its length. Do not use grounded
autoformers on the loudspeakers.