I have a few different car audio subwoofers, i no longer use and am looking to get rid of. I have 2 10" Rockford Fosgate Punch Stage 1 subs in a sealed box. Theyre Single Voice Coil 4 ohm subs. I have a single 10" Kenwood sub in a sealed box. It's a Dual Voice Coil 4 ohm sub, and I also have a single 10" MTX Magnum in a sealed box. It too is a Dual Voice Coil 4 ohm sub. They all work and sound great. I'd be happy to sell them all at once, or individually.