This weekend I made an Atari Punk Console out of some wood and PVC scraps. I wanted to make a portable player that could feed into a larger amplifier. I added a line out to the system for this purpose. The wood and PVC are glued together but the PVC to PVC connection is free. This is how I open it up to replace the 9 Volt battery inside. I think the tube PVC helps make the speaker a little louder by providing a sound box for the APC.