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
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; the TPU250 can also be rack-mounted with included brackets; TPU-B models can be rackmounted with RPK82 mounting kit (sold separately)
Peak level indicator lights when amplifier is driven into clipping
