i would have to agree with Trevor, go with the Alpine type X. i am not a fan of rockford subs...although i have been told that the T1's get pretty loud.
i have looked at all these subs....tooo..i would like them but in 15's though...i have 1 MB quart Pwe 354 @ 2 ohms 500rms on a MB quart Raa-1000..... i want something louder....some guys say they dont like the t-1's..how loud can a rl-p 15 get with 1000 rms with around 2cuft per sub....yes i hijaked this thread sorta...but its on topic...
i like the Rlp's....500$ for 2 '15 is ok...but how loud will it get....
an a type x can take 1000rms each....(they only 12's arent they...the x's that is) will they even work with 1000rms on 2...
Oh 2 is a must..(now i jacked da thread) cuz my box is being built now....an im not changing the design...best way i can think off...