OK 400 (4 MOSFET) Class AB HiFi Stereo Amplifier Board | Voltech ElectronicsProduct DescriptionVoltech Electronics proudly presents the OK 400 (4 MOSFET) Class AB HiFi Stereo Amplifier Board, designed for audiophiles and DIY enthusiasts who demand high-quality stereo sound. With its 4 MOSFET configu..