hi i jus bought 2 12" z's ( i kno nuthin bling but i dont exactly have the $ since im still in high school) and i have a fairly large sized bandpass box. the 2 woofers are faced slanted at each other and there are 2 ports per sub measuring approx..4" in diameter. Im powerin these subs w/ a lanzar v220 (175x2 @ 2ohms). Is there any suggestions or problems I would have all you experts? any feedback would be great thanks.