Model:APP-1200 Output power Stereo 8Ω+8Ω-850W+850W(THD<1%1KHz) Output power Stereo 4Ω+4Ω-1900W+1900W(THD<1%1KHz) Output power Bridge 8Ω-2500W(THD<1%1KHz) Frequency Response(+/-0.5dB)-20Hz-20KHz Input Sensitivity-0.775V Input Impedance-40KΩ balance/20KΩ Unbalance Noise(unweighted >100dB Cooling 2*Fan Protections Direct current/start/Short circuit Power Supply-220V/AC/50Hz Power Consumption-3500VA Dimensions(W*H*D)482*132*480 Weight-27Kg Shipping Dimensions(W*H*D)570*205*545 Shipping Weight 28.7Kg skype:eysound emali add :eysound(at)yahoo.com.cn