i apprecitate you guys trein to get me to use my XXX, but the thing is this, if i go with a 15 or 15's, i cant get a vary big enclosure in my trunk, if i go with 12'si can get a big enclosure in there, becuase there is a lip in my trunk that i have to clear in order to a BIG box in there, and i CANT do this with 15's unless i face them up and i dont want that, my amp i am using is an RF bd1501, i think its decent, if i buy 2 12's and get more serious i will probably buy another, and batt and so on