@bjesien --
.. Can anyone expand this position on cabinet design that in essence forms the image, or wall of sound?
Interesting observation. This review excerpt from 2012 by Wojciech Pacula over at 6moons of the Harbeth M30.1 addresses the matter:
.. I once mentioned how Harbeth speakers interface differently with the listening room than traditional boxes. Because their enclosures resonate to play an important role as acoustic generators, their sound emits across a fairly wide field more so than usual. The result is a type of sphere or warm sound bubble with us at the center. ..
Myself I'm also very keen on the overall type of presentation coming from a pair of speakers, i.e.: how the totality of the sound reproduced is shaped more or less in front of us. Generally I wouldn't as much relate these different sonic shapes to how the enclosure interacts with the sound of the drivers in variable ways than the dispersion pattern generated via either a line source, point source(s) - be they direct radiating or via acoustic transformers, omni directional speakers like Ohm's or MBL, not to mention cross-over topology and the placement of speakers. A great test of any speaker I find is mono recorded music (or white noise, even) and how a pair of speakers make the sonic shape from such cohere in front of the listener. Tom Danley of Danley Sound Labs (pro manufacturer) I believe coined it "radiation bubble" when describing the sound sphere created from playing mono recordings on a pair of DSL Synergy Horns, that effectively act as a single point source per channel - brilliant design, really. Because of not only emulating but actually acting as point sources with all that entails in regards to ameliorating timing and phase issues, in tandem with their dispersion characteristics, the Synergy Horns are successful in delivering a smooth, homogenous and single radiation bubble from mono recordings. Personally I very much crave approximating this uniform sphere-like bubble of sound as the carrier in a sense of the music presented to you, indeed a core parameter of sound reproduction if you as me.