BUY TDA7442D https://www.utsource.net/itm/p/1432878.html
TONE CONTROL AND SURROUND DIGITALLY CONTROLLED AUDIO PROCESSOR
Description: The TDA7442D is a four-channel audio amplifier with a built-in volume control. It is designed for use in car radio applications and is capable of delivering up to 2x25W of power. Features: 4-channel audio amplifier Built-in volume control Low distortion High efficiency Low noise Thermal protection Short circuit protection Overvoltage protection Applications: Car radio Home audio systems Portable audio systems Professional audio systems (For reference only)