ITC VA-6200MS 500W 8 Zones EVAC Extension Controller, 8 zones and A+B independent dual speaker loop output, 6 general audio inputs and 1 MP3 input, Output Voltage: 100V, MIC1-2 Input Distortion: <1% (output rating), 1KHz, MIC1-2 Input Frequency Response: 80Hz~20KHz, MIC1-2 Input Sensitivity: 5mV/6/600Ω, MIC1-2 Input SNR: >65dB, AUX3-6 Input Distortion: <1% (output rating), 1KHz, AUX3-6 Input Frequency Response: 80Hz~20KHz, AUX3-6 Input Sensitivity: 350mV/10kΩ, AUX3-6 Input SNR: >70dB, Spare Amplifier Input: 100V, Spare Amplifier Audio Signal Output: ±385mV (balanced output), Alarm Input: 8, Alarm Output: 8, Zone Input: 8, 24V Relay Output: 8, Fuse Size: 250V/5A.