TOA BG-235 Mixer Amplifier 35W 3 Input 1 MicLine Switchable Two Zone System Capability Affordable and compact amplifiers designed for background music and paging applications. Ideal for mid-sized environments including bars, retail outlets, classrooms, restaurants etc. 2-channel broadcasts possible for system expansion as needed through MOHZONE 2 output on BG Series amplifiers. Tamper-proof bass and treble controls preserve system settings. Security knobs for volume control included.