The Amplifier Circuit

A major part of the speaker box is the amplifier circuit. I harvested this and the speakers out of a pair of old computer speakers. The smaller the circuit board, the better. You will almost definately need to do a few alterations to the circuit to make it work for you. For instance, I had to snip the power supply wires and replace them with a 9v battery snap. I also soldered the two negatives of the speakers together and then back to the ground. Be sure to cover any loose wires with shrink wrap tubing to prevent shorts. Connect the positives of the speakers to their appropriate places. The circuit board should have labels for the left and right speakers.

Make holes through the cardboard insert for the controls. Dremmel out the plastic of the computer speakers that has the holes that line up with the buttons and dials. Hot-melt glue the circuit to the top of the cardboard insert facing out. you will also need to solder a headphone jack to the input of the circuit and make a hole in the insert for it to poke out.

Congrats! You made a Cigar Box Music Player.
http://principles.pbworks.com/SpeakerBoxDocumentation