just finished a 7.2ft^3, 2x31/2" angled adjustable ports 15" dayton speaker and 250w amp.(i would post a pic but do'nt know how) It is my first attempt and now i want to set it up properly,i have never heard a good quaity sub so i have no reference to compare. By adjusting the port length how will i know when it is tuned correctly (is this the f3 of the box)? How do i use the phase adjustment? I have heard people describe quality subs as "tight" how do i know if mine is? Is there anybody who can explain in simple terms the procedure for setting up my sub i have a setup disk (VE) and a spl meter. Any help wil be appreciated.