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2.5.3 Bridge-mono operation
Use the Bridge-Mono mode to drive loads with a combined impedance of 4
ohms or greater. (See Parallel-Mono 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 put the amplifier in Bridge-Mono mode, turn the amplifier off and slide
the Dual-Mono switch toward the right (as you face the back of the amplifier).
Both outputs receive the signal from Channel 1 with the output of Channel 2
inverted so it can be bridged with the Channel 1 output.
Note: Do not use the channel 2 input or the signal level and quality
may degrade greatly. The input jack for Channel 2 is not defeated in
Parallel-Mono mode. Any signal fed into Channel 2 may distort the
signal in Channel 1.
Connect the load across the Channel 1 and 2 red binding posts with the
positive lead from the load attaching to a red post of Channel 1 and the
negative lead of the load attaching to a red post of Channel 2 as shown in
Illustraion 2-8.
Note: The two black binding posts are not used and should not be
shorted. The load must be balanced (neither side shorted to ground).
Be certain all equipment (meters, switches,
etc.) connected to the mono output is
balanced. To prevent oscillations, both sides
of the line must be isolated from the input
grounds.
Illustration 2-8 Bridged-mono wiring
Installation
LV3620
CAUTION
2–9
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