I bought 4 subwoofers and I'm absolutely not doing a DBA! Hah!

@erik_squires *L*  Razz away, my pending project is a DBA....got the drivers, the materials, and connect hdwr. in hans....  Smaller 8" drivers roughly match a 15" in surface area, which would allow the Polk sub and a pair of 10" that double-duty here. *S*  If I really get addicted to bass, there's 3 more descending steps available to crack plaster I don't have...*tee hee*
I remember the pics of your new manse, so I can appreciate your approach to your desires.  A deep rectangular space can be tricky to tame.  If I stop burning daylight long enough to check your local 'gon locus for what room damping you've done.

Only thought in query is the interior horizontal braces at top and bottom, and their porting...seems to moi' that they could stand to be a tad more substantial....2x thickness, if space available...

So, when will the touted book become available to the clueless pubic  public?
Still in editing or absurd observation?  Ought not to be a problem collecting 'sample & holds' and not just limited to 'Goner's'....😏

Yeah, self included, no doubt...🤦‍♂️

Love the portrait, btw....my protoplasm has gone the same way, basically...

"You so ugly you could turn yourself to stone with a mirror..."

I would not discount the vibration-cancelling effect of having back-to-back drivers properly wired. Idoing this is DIY speakers and it's very significant. If side subs won't work, you could have one facing forward and one facing backwards, keep the same footprint and get the canceling effect. Pretty significant for subs with monitors sitting on top!

@lewinskih01 

I would not discount the vibration-cancelling effect of having back-to-back drivers properly wired.

Please read above.  This was thoroughly discussed with @audiokinesis  before.

@erik_squires 

Glad to see that you are going to raise the x-over point to some where around 150-250.  You will be happy that you are willing to bring it up.  Take the load off the mids.

Tri-amping is a wonderment!

Regards,

barts