I have a Rockford Fosgate sub with 600rms and 1200 peak. I was looking at getting a Hifonics Brutus BRZ1200.1 amp to go with it. But there lies a problem... at 2 ohms the amp pushes 900 watts rms and at 4 ohms it pushes 450 watts rms. Either way i go it overpowers or underpowers my sub (when it...