@ozzy62 "So what you’re saying is that it’s the perfect room?"
Yes, pretty much. Cox (www.acoustics.salford.ac.uk) did large scale simulations of hundreds of thousands of rooms, and concluded that almost everything that most people have ever written or read on the subject is just plain wrong.
And not just the usual suspects - this includes the chapter in the Electronic Engineer’s Handbook (McGraw-Hill? CRC? - can’t remember). Anyway, he presents a scattergram of good ratios (height to width to length), about 2% coverage, and another scattergram of OK ratios - about 25% coverage, both for small, medium, and large rooms.
To my surprise, I found that one of my rooms was near one of his best dimensional ratios, a small island of sonic excellence centred at 1 : 1.415 : 3.47, so I rebuilt that room to those dimensions, to 1/8" (3mm) tolerance. Screw and elastomeric glue, Quietrock over Baltic birch ply, built-in record shelves, the whole 99 yards.
Most people remark on it as soon as they enter the room, before the music starts. They comment on the quality of the silence. There’s something peaceful and calming about the room itself. Costly? Yes. Worth it? Too right. Best component I’ve ever owned. Thing is - coincidence - that's the same ratio the OP could bill to.