I have a hifonics brutus bx1205d with a 1 farad cap powering a 05 alpine type R wires at 2 ohms which according to hifonics is supposed to get 900watts RMS. Now my car runs on 12 volts, and the cap says its rated at 12 - 24 volts or something. Now does this mean that the amp is getting more power b/c of the cap. In other words, does the cap give a voltage boost or does it still run at ~12 volts? Secondly, Ive heard/read that hifonics overrates its amps, Does anyone know approximately how many watts im actually getting with this setup? Thanks for all the help!