Audio Systems: what amp or amps for subs, powerfull system, amps

Question
have 4 L712 not sure what ohm have an rf bd 0150.1 amp do i use that or just get new amps subs are in a custom box already an all the extras u think i may thanks

Answer
Well, 4 L7s are pretty commendable! you should have a pretty powerfull system. please let me know what your application is to pick out the amps though.  I dont see a RF 0150.1 exactly, did you typo the model?  depending on your application you may want this amp to run all 4 or get 4 new amps to run 1 on each sub.  let me know if you plan on just "being loud" or if you plan on enjoying bumpin some rap and and actually being able to enjoy the music and feel it or being heard from 2 blocks away.
Thanks!