Backstory - I've been lurking here a long time but I've been designing and building speakers (well, subs) since around 2002. Familiar with WinIsd and recently REW. I purchased 8 JBLs back in Aug 2018 and left them sitting in a closet due to lack of time to do anything with them.
Fast forward to now...a coworker and I work for a small engineering company. He has a lot of side-projects and hobbies, many of which require a CNC machine. So he built one. I mentioned my idea for building a sub enclosure and off he went (using Fusion 360). I told him I needed internal bracing, gave him a rough outline of what I wanted to do and I think the results turned out great. Cutting has already started.
My constraints were : (1) I could only buy 2'x4' MDF since I don't have a truck (2) I'm limited in height for enclosure since I will place them under my projection screen.
Given the above I designed an enclosure with 4 JBLs each, slightly offset vertically to fit the height constraint. Dimensions are roughly 24x42x13(?). Enough for about 50L per driver.
Ultimately I'll have two of the enclosures and will compare them to my current setup to see what can stay and what needs to go. Currently have a couple Crown XLS 1002 amps but may purchase additional amps if I keep the existing pieces.
Subs will be in rather large basement, concrete slab, unfortunately. Dimensions are 40' x 15' by 8'.
Current setup is two PA-460, ported and built to Dayton's recommended size (~5.6 cu ft) and a sealed Stryke (now Acoustic Elegance) AV-15 (purchased roughly 2002). Honestly I wish I would have bought a couple of those at the time because they are really, really good drivers with a nice aluminum cone. Especially when I had it in a 250L ported 16hz enclosure before I moved...but I digress. www.web.archive.org/web/20030604123845/http://stryke.com/AVseries.html
Anyway, once we (he) gets everything cut, I'll assembly one enclosure and post results. Thanks for all the ideas and knowledge shared in the past.
Edit: Ignore the 3" circle cut outs on the sides. There will be one cut out on the back for speaker post connection.