Oh, they do. It seems to be a little on trend right now. As far as "here," maybe we just aren't the level of DIY Bass-Heads that may populate an other forum.
Or we just aren't as willing to sacrifice the structures or layouts of our home to stash boxes of subs:
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That and BOSS Platforms, Martys and Devastators. Oh my.
In fact there are 2 Dev builds that I am aware of for quad JBL 12" Drivers.
Not the deepest of monsters, but the mid-bass output is pretty bonkers.
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Sonosubs are definitely of interest, but they get to be very large for low tunes. I suspect using something more akin to a Pro Driver or Stereo Integrity Driver, you can get the performance into a smaller package and use DSP to tame the beast. I've heard from some sources that resonances and standing waves inside a tube are very minimal. As I recall, Shady countered that they will still have some concerns. Always tradeoffs with these issues.
Regardless, there is always potential if one has the desire to make it work!
GSG Audio is a good source for Marty Sub information. I think there's also a dedicated thread on Martys over at AVS (well on its way to 300 pages long!). Also, one of the founders of GSG is the guy that designed the original Devastator build. Flat packs for a basic Dev and any Martys are available through them.