Just seeing this fascinating string, years after the last post. For some reason I thought I was the only one who knew about the Vandersteen 4's...apparently not.
I bought a used pair of 4s in 1987 or so. They were $3K used at that time (arrived on a semi-trailer; shipping cost $600 from west coast). It was love at first sight. To this day I've never heard anything equal them, not that I tried too hard. My audio jones went into deep remission after we moved to a new house in 1990.
Anyway, I had them biamped with an RM-9 100wpc tube amp on mids/uppers; and a 200wpc SS amp on the subs (started w/a modded Adcom, ended up w/a Perreaux). I thought the sound was spectacular. I had no problem at all hearing what 1st order crossovers can do. The dynamics were explosive, but friendly to the ear somehow. There was real impact, especially in the low registers (those 2 subs shook the house)--but it somehow didn't feel like I was getting pummeled by Gitmo interrogators, the way some high-power speaker systems can feel.
* Not long after, I had Modjeski modify his amp so that each of the 8 EL-34s (or KT66s/KT88s--I had them all) could be stitched to triode operation (vs std. pentode). The effect was astounding...still the best sound I've ever heard from an amp. And the 4s just faithfully transmitted all that tube wonderfulness...
I remember once having an orchestral recording on (VPI TT/Grado moving iron cartridge, a good one). It was pretty loud. A quiet passage came, and the percussionist struck a triangle. It was insanely lifelike, thrilling. I bet nobody ever went as crazy for a 1-note triangle solo as I did--and it was all because those speakers tripped my audio pleasure circuits so.
I still have them (all my gear from those day). Haven't unpacked them in 27 years. I'd be afraid to actually power the 4's now. I'll bet the surrounds are gone.
I remember talking with Richard Vandersteen circa 1989, and he was offering to mod the midrange (take out stock midrange and replace w/newer module he'd developed). I now realize he was talking about at least partially updating my 4's to 4A's, though I'm not sure he was even using that model designation yet.
LOVED those speakers!