Class AB Amplifier for Car Stereo System 4 Channel1、【Professional HiFi】Our amplifier car audio pursuit of sound authenticity, 0.07% low distortion rate, ultra-low noise floor, rich in detail, high degree of reproduction. 2、【High Power】4Ω rated power per channel 100W, 2-channel bridges rated power up to 300W, easy to promote speakers and subwoofer,enjoy high-quality sounds. 3、【Better Class AB Amplifiers 】Class AB HiFi amplifier on the sound, reproduction and design line, are better than the class D amplifier performance. 4、【Multiple conservation】Dual 30A fuse power short circuit conservation, microcomputer temperature control high temperature conservation, the output signal line bad signal short circuit conservation. 5、【Pure Aluminum Shell】Integration of pure aluminum heat sink shell, anti-shock and anti-drops, better conservation of the circuit. 6、【Sturdy and Secure】Reinforced multi-layer PCB board, fine and sturdy parts, more secure and stable, not afraid of any bad road conditions of the bumps and jitters.