kay i have more than enuff power for my btl but im kinda over the 12 inch thing.......i want to recone it to a 15 but dont wanna pay to have it shipped from hawaii....there is a guy with an brand new 18 inch q that would trade with me should i? will it be louder as far as space for the box i get enuff...power i can turn down... im looking for more output which is gonna be louder and lower?

Well cone area wise 1 18 is like 2.5 12s. So on paper you'd gain about 4.5dbs. If you're going from 2krms (rated) to 1krms rated you'd lose 3db, still gaining 1.5 in the end. The build itself would really determine if it's worth it or not- as well as your electrical and if you're giving the btl more power than rated. I'd buy the Q and keep them both if you could lol, but I prefer 18s.

I agree ^^^^^^^^^^^

well for electrical im okay not great but okay.......i stay steady at 13.0 at full tilt...i get one saz 3000 for sub amp and i'm okay with building boxes....i do the whole 45 and stuff.....

18 FTW!