i got 2 12" alpine type x's wired 2 1ohm in a 3 cubic ft. ground shaker ported box. im running a power acoustik 4000w amp and my subs arent hitting hard at all. at 1` ohm the amp "supposedly" puts out 2200w rms. alpine states that for maximum results run the sub in a 1.4 cubic ft box. my friend had this same exact setup(used 2 b his old box) for his 2 12" type r's and it slapped hard, and was clean. i used a multimeter to confirm that the subs are wired 2 1ohm and we tried hookin it up 2 my friends 1200w rms hifonics amp and same results. any1 have any idea y the subs arent working?