A DIY mono class D amplifier
The PAM8610 is a 10W stereo Class-D audio amplifier chip available in a 40pin QFN 6mm*6mm package. The PAM8610 runs off a 7V to 15V supply at much higher
efficiency than competitors’ ICs and requires a very few external components for operation. You can buy a PAM8610 amplifier breakout board for less than $2 on eBay and Aliexpress. This Instructables described how to use one of those amplifier modules along with a pack of rechargeable lithium battery to drive a 4″ speaker delivering ~15W of output power. The instructable describes also describes how to connect a charging circuitry for the lithium batteries for enabling charging through a universal micro USB charger.
A DIY class D mono audio amplifier
This amplifier is a PAM8610, a dual amplifier capable of 15 watts per channel in a very small form factor which runs at 12v DC. As we are only going to use one output, we dont have to care about overheating issues (Anyways, the chip has high temperature detection, so even better).
In this step we only are going to solder the aux port to the board with two wires. The middle lead of the aux port is usually GND, so connect it where it says GND on the amplifier board (should be very close to the left and right channel inputs on board). Then conect either lead of the aux input to either channel input on the board. If you feel, you can solder some wires to the power in on the board (where it says +12v and gnd).
