ModelRated powerOutput modelInput sensitivityS/n ratioFred ResponsePower workDimensionsCA-300W300wCA-400W400w70V80HzAC220v90CA-500W500w100V500mv>85dB15Khz+_10%/50Hz×485CA-650W650w4-16Ω+_3dB×430CA-850W850w 1,100v/70v outputs, 4-16Ω outputs RCA and XLR sockets for easy connection 2, Short--circuit, over--current. over-load warning and protection, over-heat warning available.