Highest sound quality car subwoofers

[This Guy]

I'd ask the guys at carreview.com , the forums are just like this. But I'm telling you right now there's no need to waste a grand on a subwoofer that will be complemented by just the factory setup.

[Lafferman]

the infinity kappa perfects are nice i used to have alpine type r's and they were very tight and they don't have a huge price. don't go kicker if your wanting it to be musical. that's about all i can comment right now cuz i gots to go.

[topspeed]

Definitely ask this question on the carreview.com site.

FWIW, stay away from Rockford Fosgate, I blew mine up and they just aren't what they used to be. I replaced it with JL Audio and the difference was amazing. JL has a great rep in car audio and their new long-throw series is just crazy (crazy expensive too, so watch out).

If your friend is just trying to add some balance to her stock system, like I did, a single 10" or 12" with a decent 250-500 watt amp will be fine (Precision power is always good, Zapco too). The sub, amp, and custom box can be easily built and installed for less than $600. BTW, if she leases, she should consider Circuit City as they will remove any system they install for free.