When the party gets too big for a small MP3 dock...

Check out the Party Box project to see how make use of some old speakers lying around the house.

Disclaimer: You should not attempt any of these projects unless you possess the skillset needed to complete them. I am not responsible for any damage or injuries to you or your belongings. The content and designs on this site are subject to change without notice and should be considered use at your own risk.

Design Goals: Re-purpose an Altec Landsing computer speaker and combine it with an amplifier that had a mixer, RCA inputs and a 1/4" microphone input.

Enclosure Design: 1/2" MDF. I tried to keep the box and port size very similar in size to what the original enclosure was. I added an opening above to large enough to hold the amplifier I wanted to use.The finish is a dark mahogany stain with clear coat of polyurethane. One woofer and one mid/tweeter was mounted on the front and one mid/tweeter was mounted on the back.

Schematic: I used a set of pre-assembled high pass crossovers. These particular crossovers run full range on the low pass and 5000Hz on the high pass. Typically they would be used for small 2 way surround sound speakers. I decided to swap out the capacitor with a 100uF to get the crossover frequency to approximately 350Hz. Connecting the high / low pass sections to the speakers is pretty straightforward. The left and right high pass goes to each mid/tweeter. The woofer has dual voice coils so the left and right low pass sections go to each voice coil.