I scored 2 15"q's of ebay for 405$ So im in the process of designing a new box for them. My box total after speaker and bracing displacement is 11.488cuft. So i need about 137-183 inches of port area. I was thinking a 9inx20in port 25.84 inches long for 30hz. That would leave me 8.798cuft after all displacement with 180 inches of port area. Does this sound good? If not what would you reccomend?

Box is plenty big, and port sounds good.

post a video too

post a video too

when you finish that is

Got the box built and what do you know it flexes so much. The back wall of the box probably moves about half an inch lol. So box=fail. Do you think 2 2x4s going from top to bottom of the back wall and one connecting the back wall to the front double baffle would be enough to fix this? This would be in a new box by the way. Or should I do double front baffle and double up the rear wall as well? Back wall is the I's and front wall is the \'s.

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Sorry for the crude drawing but this is the general shape of the box.

Edited June 26, 200817 yr by zdoc