This 20W stereo amplifier is a slim board has a class D amplifier onboard that can drive 2 channels of 4-8 ohm impedance speakers at 20W each. Power it with 5-12VDC using the onboard DC power jack and plug stereo line level into the 3.5mm stereo headphone jack and jam out with ease. Since it's class D, its completely cool-running, no heat sinks are required and it's extremely efficient - up to 93% efficiency makes it great for portable or battery powered rigs.
The MAX9744 amplifier is very easy to use and has both analog and digital volume control capability. Use a single 1KΩ pot (included) to adjust volume analog-style or hook it up to a microcontroller and send I2C commands to set 64-steps of volume amplification.
The MAX9744 has been mounted into a breakout, with polarity-protection, jacks and terminal blocks, i2c level shifting, and a spot to solder in a volume potentiometer. Each order comes with one MAX9744 breakout board with all surface-mount parts fully assembled and tested, 3 x 2pin and 1 x 3pin terminal blocks, a 470uF power filter capacitor and 1KΩ trim potentiometer.
Note: To use this board, a little soldering is required to attach the terminal blocks and other components, but its fairly easy and expect it should take less than 15 minutes.