Inter-M PA-6312 - Manual (Page 8)

PUBLIC ADDRESS POWER AMPLIFIER
6 PA-6312/6324/6336/6348
6. HIGH-PASS FILTER SWITCH
This switch activates the high-pass filter circuitry, which decreases frequencies lower than 400Hz by –3dB.
The high-pass filter is designed to protect speakers from damage caused by excessive low frequency
transients.
7. AUDIO INPUTS
These balanced XLR jacks are for the input of audio signal.
8. GROUND LIFT SWITCH
This switch provides for connection or disconnection of the amplifier’s ground to AC “earth” ground, to
prevent noise from ground loops. Under most circumstances, this switch should be set to FRAME position.
9. DC INPUT TERMINALS
These terminals are provided for the connection of backup battery. Connect a 24VDC(100A) battery source
to these terminals. Make certain the red terminal is connected to the battery’s positive (+) side, and the black
terminal to the battery’s negative (-) side.