1Gather the items.
Purchase the device: LM386 Mini Audio Power Amplifier Board.
I found a 2 pack off eBay for a little over $10.
I had a 9V battery in the junk drawer and had a 9V battery adapter from another project not being used. You can also purchase those in bulk (very handy to have)
Gather some speaker wire (probably a smaller gauge works better here). I have a spool that I purchased a while back that I was able to use.
2Insert the respective wires in the correct places on the board. Screw them down.
3Attach the speaker of your choosing. You may also add electrical tape or solder to make a better connection.
4Insert an aux cable into the board with the other end inserted into the audio player of your choice
5Attach a 9V Battery to the connector. (There is no on/off switch so be aware of power consumption)