Parallel-Mono Operation; Parallel-Mono Wiring - Crown Micro-Tech 600 Reference Manual

Micro-Tech 600/1200/2400 Power Amplifiers
CAUTION: Only connect balanced equipment
(meters, switches, etc.) to the Bridge-Mono output.
Both sides of the line must be isolated from the in-
put grounds or oscillations may occur.

3.3.3 Parallel-Mono Operation

Parallel-Mono mode is used to drive loads with a total
impedance of less than 4 ohms (see Section 3.3.2 if
the load is 4 ohms or more). Installing the amplifier in
Parallel-Mono mode is very different from the other
modes and requires special attention.
To select Parallel-Mono mode, turn off the amplifier and
slide the stereo/mono switch to the left (as you face the
back panel). Connect the input signal to channel 1 only.
MIXER
MICRO-TECH AMPLIFIER
PARALLEL-MONO MODE
ONLY USE THE CHANNEL 1 INPUT
CHANNEL 2 IS
NOT USED IN
THIS MODE.
CH-2
STEREO
PARALLEL BRIDGE
MONO MONO
STEREO
PARALLEL BRIDGE
MONO MONO
CAUTION:
TURN OFF AMPLIFIER
BEFORE CHANGING THIS SWITCH.
Fig. 3.6 Parallel-Mono Wiring
The channel 2 input and level control are bypassed in
this mode, and should not be used.
Connect the load to the channel 1 output as shown in
Figure 3.6. The positive loudspeaker lead (+) connects
to the red (+) channel 1 binding post and the negative
(–) or ground lead from the loudspeaker connects to
the black (–) channel 1 binding post. Finally, install a
jumper wire of at least 14 gauge between the red (+)
binding posts of both channels 1 and 2.
CAUTION: When wired for Parallel-Mono mode, do
not operate the amplifier in Stereo or Bridge-Mono
mode until the output wiring is reconfigured. Fail-
ure to do so will result in inefficient operation, high
distortion and excessive heating.
ADD A 14 GAUGE
(OR LARGER)
JUMPER BETWEEN
THE RED CHANNEL 1
AND CHANNEL 2
BINDING POSTS.
CH-1
+
–
LOUDSPEAKER
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