... 2 High quality, beautiful appearence 2 Competitive price Professional power stereo amplifier Technical parameters ModelP20P30P40P50P60Stereo power 8Ω200W300W400W550W750W1KHZ 0.1%THD ... Impedance30K/15KCross talk≤-70dBLEP indicatorSignal(-30dB,-15dB,-3dB),Protect,Power,Clip stereo amplifier, professional amplifier, professional stereo amplifier, audio amplifier