starting enclosure

im starting to build a fiberglass enclosure and im using my spare tire well and the rest of my trunk as well i used a rough estimate that i would have about 2.5 cubic feet but before i build my rings i want to know what would sound better in this area one 15, one 12, or two twelves, its in the back of a dodge neon if that helps any suggestions would be great

i think your math is a bit off.....i will gaurantee you trunk is larger then 2.5 cubes with out even factoring in the 1.5 cubes of spare tire well...

and like it was said...your music preferences will play a large role in what sounds nice...the smaller the woffer the more accurate and responsive it will be (to me that is what sounds nice, perhaps you like the sloppy play of a 15 or 18) go to your local audio shop and find out what you like to listen too...remember you will be in a huge shop not a car so it will sound different in your car

once you figure out what style of music you like and what you figure it sounds best on ( done at shop, they may even let you play your own cd) you will know exactly how large an enclosure you need...

now depending if you want ported/ vented or sealed.  your numbers are again going to be greatly effected...

now do you ant it stupid competition loud or do you want clean SQ? this will also help you chose a driver size and brand.

once you know the above things you can figure out how many drivers you can afford..(like mentioned higher quality drivers will bring premium prices but probably better quality).

know your budget...drivers, amps, spare batteries, wiring kits, sound deadening, (deck and components if you dont have 'em) MDF, fiberglass supplies, primer paint, carpet, vinyl.  it adds up in a hurry...full trunk fiberglass enclosure i bet your looking upwards of 400 bucks..

anyway i like 12's and 10's..not together, just in general...you may consider looking into RE (resident engineering) or ED (elemental Designs) for subs

no one should be able to tell you what is nice and not nice...some people swear by Dual, and Legacy, personally i think it is crap, JL is nice but overpriced, i cant stand Kicker, Rocford has served me well in the past, so to has Pheonix gold...MTX fits right in with all the other big box store stuff..now rockford has a big box store line too...LOL crap just keeps falling from the trees...

anyway, only you can tell what sounds nice to you...so go out and listen around...