ok my question is weither i should go with the the rockford fosgate 1.. 15" t2 which is 1000rms 2000max or 2 15" hx2 which are 600 rms a piece and 1200 max.... which setup will give me the most hit and spl... i have a jbl bp1200.1 amp to push the sub or subs,,, also i have a 63 impala i am putting it in.. also.. the t2 has a 304 oz magnet and the recommened enclosures is ported 2.75 tunes to 28 hz.. what does it meaned by tuned to 28 is that when my sub is going to hit the hardiest and loudest and best? also i am putting it in a 63 impala i have 4" 6x9 rockford fosgate 2 fast 2 furious limited edition in the back for rear feel. and a diamond audio hex 6.6 comp set up front power by a jbl 80.4 bridge pushing about 180 rms in to each speaker.. also i want to put some dyno xtreme in the trunck will 36 sq feet be enough to do the whole trunk.. i also have 2 pumps and 8 batterys in the back for the hydloics