Wiring; Stereo (Two-Channel) Operation; Stereo Wiring - Crown Macro-Tech MA-1200 Reference Manual

Macro-Tech 600/1200/2400 Power Amplifiers

3.3 Wiring

This section describes the most common ways to in-
stall your amplifier in a sound system. The input and
output terminals are located on the back panel. Please
use care when making connections, selecting signal
sources and controlling the output level. The load you
save may be your own! Crown assumes no liability for
damaged loads resulting from careless amplifier use or
deliberate overpowering.
CAUTION: Always remove power from the unit and
turn the level controls off while making or changing
connections. This is very important when loudspeak-
ers are connected because it reduces the chance of
loud blasts that can cause loudspeaker damage.
Macro-Tech amplifiers may be operated in one of three
modes (Stereo, Bridge-Mono, and Parallel-Mono) by
switching the stereo/mono switch on the back panel.
There are VERY IMPORTANT wiring differences among
these three modes which will be discussed next.
Reference Manual

3.3.1 Stereo (Two-Channel) Operation

In Stereo mode, installation is very intuitive: input Chan-
nel 1 feeds output Channel 1, and input Channel 2
feeds output Channel 2. To put the amplifier in Stereo
mode, first turn off the amplifier, then slide the stereo/
mono switch to the center position, and properly con-
nect the output wiring as shown in Figure 3.4. A pair of
5-way binding posts is provided for each channel to
facilitate easy connection of loudspeaker wires. Ob-
serve correct loudspeaker polarity and be very careful
not to short the two outputs.
CAUTION: In Stereo mode, never parallel the two
outputs by directly tying them together, and never
parallel them with the output of another amplifier.
Such a connection does not result in increased power
output, but may result in overheating and premature
activation of the protection circuitry.
Note: A method for paralleling multiple amplifiers for
fail-safe redundancy is available from Crown's Techni-
cal Support Group.
Fig. 3.4 Stereo Wiring
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