@bdp24- I learned to listen on the old Quad circa 1974, and though I eventually added ribbon tweeters (Decca, later, Sequerra) and a sub (Swedish as I recall, there weren’t as many in the pre-home theatre days), could not get it cohere. The midrange of the original Quad is unbeatable, but its limitations as an overall speaker are significant; my same 1974 pair (built I think in 1973) was restored and runs in a vintage system with a pair of restored Quad IIs using GEC KT 66s.
Oddly, despite my penchant for electrostatics (I had the Crosby- modded 63 next), I made the transition to horns or at least horn style with ease via the Avantgarde (which doesn’t use a compression driver and has a hybrid dynamic speaker bass module with plate amp-- not a "true" horn system in absolutist terms). But the midrange, direct wired to the Lamm ML2 is a thing of beauty. I supplement with 15 inch subs and DSP on a parallel system, and with the current crop of cartridges, have not had it better.
The Quad was and is quite forgiving, and will tolerate a certain amount of noise from associated components without flinching-stuff that the AvG SET system would show up as annoying.
If I have a point at all, it’s that it is not an unnatural transition- from stat to horn; the problem I foresee, if I go deep, is all the separate components that make up a true horn system combined with an intelligent selection of range and crossover units that don’t do violence to the signal.
My next journey is intended to explore antiquarian horns to see if multi-driver horns with SET and appropriate horn woofing sounds like real music to me. But that is my ’schtick," not necessary a path that I am urging anyone to follow.
I did write a piece about Quad and the original speaker shortly after the 60th anniversary; I think it is a speaker worth hearing, not only for how far we haven’t come in some ways, but how far we have. It’s a classic for what it does well- a seemingly transparent window on the sound from a distant perspective that is balanced if you sit in a fairly narrow sweet spot, will not play loud as in LOUD, but can convey dynamics effectively because it has a very dialed in immediacy within its range, loudness capabilities and scale. A double pair with all the associated paraphernalia would be much fun, though I have never done that.
There is always a "quest" in these stories, no?