This box is close to that with charcoal carpet and flush mounted sub. All corners have been smoothed with a router. It is just sitting in my garage, without the Brahma.
whats the exact cuft and tuning? I may have a similar box already built, if the specs match I can do $35 plus shipping. Looks awefully close to what i have, just too lazy to calculate right now. my box is 2cuft tuned to about 33hz and it looks pretty close to them dimensions. but i dont have black carpet, I can leave it MDF or add grey carpet for $10 more.