Subwoofer for Gmc Envoy

[Mastercraft241]

I have a 2004 fully loaded Gmc Envoy. Sound system's not bad but i want to add a sub woofer, 12" preferably. I'm clueless on what to get but I don't want to A.) Blow my speakers or B.) Drop $200 (short supply of money being at college). If anyone has something used they'd like to let go of or any suggestions, I'd greatly appreciate it. I've been looking at www.etronics.com because of their competitive prices:p

Thanks,
Jay

[Ziemer]

Last year I put a single 10" Memphis Audio DVC sub and a "old school" Orion amp in my boat (both of which I bought on Ebay) and it sounds really good. I think I spent $50.00 on the amp (which was re-furbed to new) and the sub was I think less than $100.00.

If you by one sub, go for a dual voice coil so you can wire it down to 2 ohms and get the most out of your amp. (As long as it can support 2 ohms.)