Model Number: C-4085 Key Specifications/Special Features: RMS 85W*4CH @ 4 ohmsRMS 160W*4CH @ 2 ohmsRMS 320W*2CH @ 4 ohms bridgeNickel-plated terminalsSoft start sound, PWM power supplyInput sensitivity: 100mV-6VT.H.D.: <0.05%Variable low pass/subsonic filter: 60Hz-1.2kHzDouble PCB boardDie-casting block terminalsOffer color g.box & spare partsBass boost: 0-12dbSignal-to-noise ratio: >92dBProtection: DC, short, thermal, overload