If you want to create your own mini and modded sub/speaker for ANY mp3 player and in the mood to get your hands dirty. Or, you may have some extra stuff lying around the house like a used CD spindle case, Old-working speaker, screws, wires, tapes, etc..you may want to visit FadeproofOnline for a Do-It-Yourself guide on how to start this elcheapo mp3 player sub.