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For the quick connect terminal block, use the female connector provided. Pin 3 carries

the + (hot, non-inverting) side of the signal. Pin 2 carries the – (low, inverting) side of the

signal. Pin 1 is ground (see Figure 3).

If you are using the standard input module for either amplifier, the polarity of the balanced

inputs can be reversed by changing four jumpers located on the input board, just behind the

input connectors. If you are using the ACM-1 module for either amplifier, the polarity cannot

be reversed. Refer to page 12 for a description of the different modules.

4.6.2 Unbalanced operation

For the 1/4" phone jack, use a 2-conductor (tip-sleeve) 1/4" phone plug. The tip of the plug

carries the signal and the sleeve is ground. The ring connection in the jack is automatically

grounded by the sleeve (see Figure 4).

4.0 Installation

Figure 3

Quick connect terminal block

balanced input connection.

Figure 4

1/4" phone jack unbalanced

input connection.