PUZU PZ-D8 D-Class Car DSP Amplifier features a 4 X 70 Watts RMS at 4 ohms with a peak power of 4 X 220 Watts at 4 ohms. It comes with a frequency response of 20Hz to 20KHz and THD <0.01%. Additionally, it has an isolation of >90dB, RMS, 4 x 70 W at 4 ohms/ 4 x 150 W at 2 ohms, Peak power 4 x 220 W at 4 ohms/ 4 x 500 W at 2 ohms. The PZ-D8 is capable of producing high sound pressure levels to give you an immersive audio experience while driving. To get the most of the amplifier, it is recommended to have it installed and configured by an experienced professional.