Inputs for 600-ohm balanced telephone line, Lo-Z balanced microphone, and background music - Music input (RCA jack or screw terminals) - Integral automatic level control (ALC) circuit for controlling pages made by persons with varying voice levels and paging techniques - Page from telephone and/or microphone - Signal-activated paging channel automatically mutes background music - Adjustable background music muting level during a page - Music gradually returns to its normal level after a page - Audio Enhancement circuit increases intelligibility, improves perceived loudness (with no increase in power), and reduces listener fatigue - Separate controls for page volume, music volume, night ringer, music mute, and Audio Enhancement - Bass and treble controls - Built-in night ringer activated by contact closure or by 90V ring signal - Balanced or unbalanced 16-ohm, 25V, 25V CT, and 70V outputs are available on the TPU250 - VOX sensitivity level control eliminates accidental transmission of background noise from a paging telephone - Thermal and electronic overload protection - Jacks provided for bridging additional TPU amplifiers - Brackets are attached to each model for easy wall mounting - Peak level indicator lights when amplifier is driven into clipping - 120V AC, 60 Hz power source - UL and C-UL listed BRAND NEW BOGEN