Well I've invested a substantial 8 hours into the box for my 4 15" Maw's, taking my time doing everything, and making sure everything is good and strong. Here is some pics of the monster, its 90% done, carpeting and glueing the last piece on tomorrow...

Went with 3/4" MDF, 7.5" Sonotube ports, and I have 2 of the 4 15"s in my possession...

 

How many braces you have in the box?

 

i see single layer.. i would atleast double up that woofer baffle

 

ya man double that baffle for sure but let us know how she sounds

 

There is one brace going vertically dead center. Its a 2x2" piece of solid oak...

I will see how it sounds first, but throughout the build I have been considering the double baffle for the top since its so thin at parts, and since you guys agree I just might.

 

Looks pretty serious. I would be most interested in your interpretation of the sound..

 

Looks nice, but i agree with the other members about a double baffle. All i can picture is box flex.

 

its not too late!! lol

lookin real good though man, is this your first box?

 

i'd go with smaller ports, much smaller. u gonna have way too much port noice.