Inter-m PA-9312 Operating Manual page 9

PA-9312/PA-9324/PA-9336
5. AC Connector
Connect the supplied standard AC input cable here.
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. 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.
8. DC Input Terminals
These terminals are provided for the connection of backup battery. Connect a
24VDC 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.
9. Fan Vents
These vents provide hot air flow out of the unit. It is important to keep them free of
obstructions, to prevent the unit from overheating. It is also important to operate
the unit in a dust-free environment.
Power Amplifier
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