Ok so heres the deal.. I have 2 12" DVC 4ohm (500-750 rms) Alpine Type R's running on a Refurbished Memphis Prxa 1500.1 running at 1 ohm (yes, amp is 1 ohm stable) in a Ground Shaker box thats tuned to 30hz and 4 cubes total.. I have a 250 amp H. O alternator and an AGM battery under the hood...