TOA BG-M Series Mixer/Amplifiers for installed sound system paging, music distribution and messaging applications offer microphone and telephone paging inputs, program and auxiliary music inputs plus a flexible module slot compatible with industry-standard TOA 900 Series modules which have an extensive array of features and connector types. Outputs include transformer-isolated 25 V, 70 V and 4 ohm, balanced, line-level Music-On-Hold plus a 1 watt output for driving an additional 8 ohm speaker zone. Muting modes include an Auto-Mute function for voice-activated paging override of the BGM channels with-out interrupting the MOH output. External mute terminals allow you to activate the mute function with an external switch-closure. Standard features include bass/treble controls, insert jacks and Signal, Clip, and Power indicators. Accessories include optional rack-mount kits and volume control security knobs to protect settings.