hey guys i just got the newly aquired 4 12" jl w3v2's metered, they are in a box tuned to 47 hz on a rockford bd1000a1 amp at 2 ohm, it hit 140.8 i know these subs are underpowered but im looking to sell them and start scratch, im willing to take up my whole backseat but i want this system to hit a bit lower frequencys then 47hz, i have my subs and amp sold for a $1000, so thats some money to start off, and then i can work on more money after that. i am thinking 2 18's, running off maybe 1800-2500 rms, i want to be able to hit mid 140's possibly a 150 or louder , does anybody have a set of subs and amp i should consider please post your opinions.