Personally I have owned a few subs behind me seat..and the most impressive is jl shallow .. tw1 and tw3 in jl sound decent but I think the tw1 is around 1500 for 1 by players .. pioneer and rf shallows may not give u what u want ..
The JL TW3 is pretty good in a small sealed enclosure. Good for about 500RMS... you can prob run about 250RMS in mids+highs. Would get you moderately loud.
