Re: input please: finally putting a sub in my '97 Civic...
Get one 12, a 12k ported as mentioned would be what you are looking for i think. A profile CA 800 would power it very well assuming you get the single 4ohm voice coil. I just reread your post, and saw you are relaly after sq and punch bass and all. For that you should really use a sealed enclosure, but you will not **** off your passengers, and it is not going to give you a headache. On the other hand if you ported it and tuned to around 28hz, you would pound, and it would also sound very good.
ED 12K.14 -135
Profile CA800- 120
Walmart Wiring-25 bucks
Build your own box-45 bucks
So thats a little over your budget, but i dont think you will be happy with a single comp vr as far as sq goes.
Alpine CDA-7995, A/D/S 3 Series Comps, ED 8A, SoundStream Reference 604, 98 Civic Sedan