System preamplifier, 6-zone LBB1925/10

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Six-zone system pre-amplifier, with single or dual channel operation
Two input channels for call stations
Universal input for microphone/line, with speech optimized tone control
Three inputs for BGM selection and music optimized tone control
Front panel zone selection for BGM and call station zone selection for calls
PC and trigger inputs for automated calls, alarm tones and chimes to selected zones