It's not a top of the line system that will have everyone drooling, but it's adequate for my needs. I'm not a huge audiophile, but I do like some bass and the stock JBL 10 Speaker system was definitely lacking in that department. I picked up a cheapo sub/amp combo from Circuit City. It's a 480 dual channel amp powering 2 10" Sony Xplode subs all housed in a Dual 10" enclosure.

Originally my cousin was going to install it for me, but he had problems finding the proper Line Speaker outs to tap into. I don't know much about audio systems, so please don't expect me to answer the very technical questions but feel free to ask. After a couple of days of fiddling with it, I cut my losses and just took it back to CC to have them install it for me. They also had difficulties getting it installed. I dropped it off at 1030am and finally picked it up at 730pm that night. They said they had to call JBL and have them fax over the schematics. Well, enough words here are pics.

Amp mounted under front passenger seat. Once you have the passenger seat back to a comfortable level, you can't see that amp underneath unless your head is next to the carpet.:

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