I would like a nice set up that will get louder than 4 12" pioneers (don't know which model). wh would I be better off getting, and should I get 12" or 15"? What kind of amp would I need to power 1 of these?
Loudness, the SX will get louder than a Brahma with a given power level, still great SQ. But, the Brahma has a little bit better SQ if that's what you're aiming for. 2 of either of these subs in 12" form would outdo the Punches, if you wanted to outperform them by a large amount, get the 15s.
If you only want one of these subs, then get an SX 15", put it in a ported box, and give it around 1000W RMS.
Last, how much money can you spend total, and how much trunk space to you have?
Also, I listen to a lot of lamb of god and cradle of filth. Would the 15" be able to respond fast enough to hit the double bass roll decently accurate? I like the idea of only having 1 15" sub so I may have a little room in the trunk for some of my paintball stuff.
I am getting my SX 15 in the mail this week along with a ported box from thecaraudiobox.com over 4 cuft. tuned to 30hz and powered with a crossfire vr1000D and this thing is gonna be very LOUD and Clear. Actually it will hurt to be in the car on most songs with heavy bass.