I believe I now own the speakers in the OP, if I understand the provenance correctly. The speakers were supposed to anchor a series of upgrades but as the infant became a curious toddler, the only additions I've added are the speaker grills and a baby gate. Nonetheless, these speakers were a serious upgrade over the Monitor Audio Radius towers I had purchased because they were easy to pack from move to move.
Love how these speakers can handle most everything thrown at them. From classical, hip hop, r&b, rock, tejano (toddler loves bopping to Selena's rhythmic beats), dance or Kpop, it really doesn't matter. I can play them loud without them being fatiguing to my ears. They play low and tight, though they do miss some of the really low low's as already mentioned but it's not every day I'm in a trap hop kind of mood. Additionally, I now understand the value of a midrange driver.
I thought about building some additional speakers over the MN winter (been bitten by the quest for the perfect speaker and have time/patience to burn), and looked for Selah's DIY kits to build. Unfortunately, Selah's page is now down and after searching, learned of the owner's passing so I thought to throw my appreciation as his creation/speaker's fill our living room most evenings after picking up the toddler from daycare.
If there's a page or if someone has archived his designs, could someone point me to it? I still wouldn't mind building one of his other designs that I see on their FB page or were on Selah's page. Would hate for his loss to extend also to the greater DIY community's knowledge base unless there's some IP involved.