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View Full Version : help with comp box for 18"



REDz28
08-12-2013, 07:03 PM
Hey all I got my self a crossfire xs v.2 D1 18" subwoofer my current daily box I fogot about its low tuning (32hz with 7.5 cubes) my port is 7" wide and around 200sq in ir more. I took it to state finals yesterday and hit a 143 on a sweep and 142.7 on on music came in 1st place stock suv 2 and 3rd in featherweight. My resonance frequenc was 38hz so here we go if I build a box out of birch how much space should I gave the sub and then what should my tuning be to peak at 38hz? Port size everything I'm trying to get around 145- 147 so I can keep up with everyone in featherweight. Thanks all!!

REDz28
08-13-2013, 09:02 PM
Dave the box guy quoted me $60.00 for just a design so anyone have any suggestions or anyone know of reliable box designer's I can contact on here??

T3mpest
08-13-2013, 09:41 PM
7.5-8 cubes at 35hz would be a decent place to start. Peaking at 38 I'd try sub up port back or sub up port to the side.

Buck
08-13-2013, 10:21 PM
I can design you a box for $30.

REDz28
08-14-2013, 12:39 AM
Hey buck I actually just left you a message if you wanna move this to pm I'd be more than happy to work this out

93Exploder
08-15-2013, 02:49 AM
I can design one. Ill do it free. Done all my boxs.