PA Tech PMA-200 User Manual - page 7
7
Precautions:
1. Bridge mono mode makers it possible to drive thousands of watts into a single speaker
AC current consumption will usually be higher avoid excessive single level and made sure
the wiring speaker can handle the power.
2. Do not use 2-ohm loads.
Installation:
Rack mounting of the amplifier is optional use four screws and washers when mounting
the amplifier to the front rack rails.
Connections inputs:
Each channel has active balanced XLR and 1/4” (6.3mm) inputs wired in parallel. The
input impedance is 20k ohms balanced 10k ohms unbalanced.
Balanced signals are less prone to AC hum, but unbalanced signals can be suitable for short
cable runs. The signal source’s output impedance should be less than 600 ohms to avoid
high frequency loss in long cables.
Balanced inputs: Use the XLR.
Unbalanced inputs: Connect the unused side of the balanced input to ground, as shown
above left. A tip-sleeve 1/4”(6.3mm) connector will correctly terminate the unused side of
the input without modification.
For two-channel (stereo) operation, use the inputs for both Channel 1 and Channel 2; for
parallel or bridged mono operation, use the Channel 1 input. To patch the audio signal to
other amps(parallel and bridged modes only).