for 500 you could get 2 high quality 10's and a decent amp. heres what you need to be thinking of..

headunit - 150 older yet high quality $250 for a new one, good brand with good eq setting. your gonna need it if all your doing is ading bass. You need to be able to tune your factory door speaker.

Amp. 200 will get you a decent 500 watt amp. Dont spend it on a 1000w cheap as amp. Make sure you spend your money on a high quality amp that puts out what it claims. older rockford 500/2 are pretty good. Jl 300/2 are still pretty cheap.

Subs. Boston,JL w0's,memphis, RE,powerbass are some good subs that offer great sound at affordable rates. I'm not a fan of the Rockford or kicker lower class stuff. I'm sure others people will disagree but that just my opinion

Wiring. you can get a way with 8awg kit. Save yourself some money and work by buying the 4awg kit now. If not than your going to spend more money and do more work later down the road when you want to go bigger.


good luck!