I have two of these in my Blazer and they pound really hard. I have them in a ported box hooked up to a 1200w Sony Xplod amp and they make my roof rattle!

Cheap, great sound, handles much more then it says it can.

Bottoms out if the low tones get too low, but only if it's turned way up.

The Orion Cobalt Series 2 is an amazing product. I picked up a pair of 15s from a friend of mine that wanted to upgrade. He had them in a box that was two times too small for them (and wouldn't fit in my car at the time!), so I removed one and traded it for a box for the other one. With a proper box, this subwoofer is incredible, especially for what they go for. A local pawnshop was selling them for $50 a peice three years ago (which is about what I paid for mine). The only time I've ever even heard this subwoofer bottom out is whilst listenning to Banco Di Gaia's "You are here" album, which is a techno album that's very heavy on the very low, loud bass. It bottoms out on the loudest portions of the song, but only when I have it cranked. I currently have the sub powered by an Alpine 3554 which is set up to deliver 750 watts into each voice coil of the sub. I don't have it cranked, but so far, the sub has handled everything I've forced it through. All in all, I would recomend this sub to anyone looking to enhance their audio quality by adding some extra bass, as this sub handles both the higher and lower tones beautifully whilst maintaining a good quality of sound. The price factor is also a win.