Crown Micro-Tech 2401 - Bridge-Mono Operation Wiring

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Micro-Tech 600/1200/2400 Power Amplifiers
CAUTION: In Stereo mode, never tie the amplifier’s
outputs directly together, and never parallel them
with the output of another amplifier. Such connec-
tions do not increase the output power and may acti-
vate the protection circuitry to prevent overheating.
3.3.2 Bridge-Mono Operation
Bridge-Mono mode is used to drive loads with a total
impedance of at least 4 ohms (see Section 3.3.3 if the
load is less than 4 ohms). Wiring for Bridge-Mono mode
is very different from the other modes and requires spe-
cial attention. First, turn off the amplifier. Then select
Bridge-Mono mode by sliding the stereo/mono switch
to the right (as you face the back panel). Both outputs
receive the channel 1 input signal, but channel 2 is
inverted so it can be bridged with channel 1. DO NOT
USE THE CHANNEL 2 INPUT or signal quality will be
greatly degraded. Also, turn down the channel 2 level
control (fully counterclockwise).
Note: The channel 2 input and level control are not de-
feated in Bridge-Mono mode. Any signal feeding chan-
nel 2 will work against the channel 1 signal, and usually
results in distortion and inefficient operation.
Connect the load across the two red (+) binding posts
as shown in Figure 3.5. The positive (+) lead from the
loudspeaker connects to the red (+) channel 1 binding
post, and the negative (–) or ground lead from the loud-
speaker connects to the red (+) channel 2 binding
post. Do not connect the black (–) binding posts. Also,
the load must be balanced so neither lead is con-
nected to ground.
MIXER
LOUDSPEAKER
–
+
ONLY USE THE CHANNEL 1 INPUT
DO NOT
USE
DO NOT
USE BLACK
TERMINALS
STEREO
BRIDGE
MONO
PARALLEL
MONO
CAUTION: TURN OFF AMPLIFIER
BEFORE CHANGING THIS SWITCH.
STEREO
BRIDGE
MONO
PARALLEL
MONO
CH-2
CH-1
TURN CHANNEL 2
OFF (FULLY CCW)
IN THIS MODE.
MICRO-TECH AMPLIFIER
Fig. 3.5 Bridge-Mono Wiring
BRIDGE-MONO MODE