We are manufacturer, professional amplifier 1, Chime, 2. Pure copper transformer 3. Short-circuit,over-load protection ModelRated powerOutput modeInput sensitivityS/n ratioFred ResponsePower workDimensionsPA-8100B100W70-100V,4-16Ω500mv>85dB60Hzι18KHz±2 dBAC220V±10%/50Hz 90×485×430 We are manufacturer, professional amplifier.1.100W2.Chime3.Pure copper transformer4.Toshiba amplifier tube made in ...