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Controls for adjusting bass, treble, and presence across three frequency bands.
Main control for adjusting the overall output volume of the amplifier.
Connection for AC power input and access to the fuse compartment.
Terminals for manual priority switching, muting AUX/CD for Paging/Mic.
Outputs for connecting speakers at various impedances (4, 8, 16 ohm) and 70V/100V.
Input for paging into the PA system using a telephone set.