MONO Class D High Power Car Ampilfier Load 4 Ohm: 500W RMSload 2 Ohm: 850W RMSload 1 Ohm: 1500W RMSSignal to noise ratio: 100dBFrequency response: 15-250HzTHD: 0.01%Dimension(L×W×H):430×273×51mm