5-Channel Class AB Car Ampilfier Load 4 Ohm: 40W RMS x 4 +120W RMSload 2 Ohm: 60W RMS x 2 +200W RMSBtl 4 Ohm: Signal to noise ratio: 90dBFrequency response: 20-20KHz & 15-250HzTHD: 0.01%Dimension(L×W×H):342×244×49mm