I just installed 2 10" Sony Xplode subs with a 500 Watt Sony Xplode amp in my eclipse about two weeks ago and they sound like crap. It's loud but the bass just doesn't hit hard. It sounds distorted once the bass hits. But then again you get what you pay for. I got the two subs and amp for $188 at 6th Ave Electronics a few months ago. But I love the setup that I have in my civic. I have two JL Audio 12" subs (I think they are the 12w0) with a 300 watt fosgate punch amplifier. I bought this setup about 7 years ago and it still sounds good. Even though they are the lowest subs that JL Audio makes, the bass hits real hard. I think it's because of the amp. Some people say that the old school fosgate punch amps are the best ones fosgate made. I think you should stay away from Sony or anything else cheap and go for something high end even if you have to spend a little more money.