ProCo AV1-B Audio Visual Passive Direct Box Option:ProCo AV1-B Audio Visual Passive Direct Box along with an additional "Ceiling"

along with an additional "Ceiling" fine-tune function which can increase gain reduction (lower threshold) while simultaneously raising output level to match

You can even use a footswitch to control the talkback hands-free

An external no-noise power supply delivers the perfect amount of power to run your modules with crystal-clear sound

Fully differential ALL-TUBE circuitry using one each 5670

68″) diameter microphones with M22 threading at their base

ProCo AV1-B Audio Visual Passive Direct Box Option:ProCo AV1-B Audio Visual Passive Direct Box along with an additional "Ceiling"he Pro Co TradeTools AV1B Audio Visual Interface allows the line level outputs of audio and video playback devices, etc., to be connected to microphone inputs of house or portable P. A. systems for programs in school auditoriums, lecture halls, civic meetings and corporate board rooms. The AV1B provides audio interfacing and isolation with wide response and low distortion. Three different types of input connectors1 4 (6. 3mm) T R S phone, 2 RCA type