AllanLuberda Posted October 16, 2012 Report Share Posted October 16, 2012 well I have 2 solo x 18s on a warhorse, its 17.8 cubes after displacement, with about 210 sq of port. I had the port length calculated for 35 hz by a box designer. It is a wall with port on top in a 2 seat 2003 ford focus zx3 hatch, Ive read that the resonant freq of a ford focus is around 55hz. But im sure that is probably not based off a walled system(so it could be higher/lower) lmk if you know please.. I built and tested the box and I couldnt even hit decent below 38-39hz. The bass picked up the most around 46-48 hz. could my cabin gain cause this? Do I have to confiscate for it? Also Im pretty sure 210 sq inches of port is not enough port area for 35hz tuning @ 11.79 sq inches per cubic ft (especially with subs with slightly more cone surface then 21s). But in this case i think its even higher then 35 hz tuning am i wrong? I need too lengthen my port and tune too around 30 hz, do you disagree? I really would like too hit 27-43hz pretty decently, would love too be my loudest around 32-33hz what should i do? Link to comment Share on other sites More sharing options...
AllanLuberda Posted October 16, 2012 Author Report Share Posted October 16, 2012 Bump. Link to comment Share on other sites More sharing options...
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