Adafruit max9744 20w stereo amplifier class d 4 to 8 ohm adafruit 1752 a 20w stereo class d amplifier fully assembled and mounted on a breakout board the amp can drive 2 channels into 4 to 8 omega impedance speakers at 20w each 5 to 12v dc power to the amplifier is via an onboard dc power jack and there is a 3 5mm stereo jack for stereo line level the class d configuration means that the amplifier is completely cool running requiring no heat sinks or thermal management and also the ampli