700 watts

I am currenty running two old Punch P2 200 watt rms 12 inch subs off of a Punch P500-1bd amp. The amp is rated to give 701 watts at 1 ohm. The subs are in an audio enhancers prefab ported box. I have a Sony XAV-60 touchscreen HU. I want to step up the subs because the RFs are currently pulling...