supply professional stage amplifier A8

POWER:400W-800Wcolour:BLKFrequency Response:20Hz-20KHzInput Sensitivity:0dB(0.775V)Balance Input Impedance:20K ohmUnbalance Input Impedances:10k ohmS/N Ratio:>96dBChannel Separation:>85dBDamping Factor:>800Protection:fuse,short circuit,speaker protectionCooling System:Vent for efficient cooling,fan with little noise