I’ve had my ESS AMT6 professionals for 2.5 years now, they’re the size of small refrigerators so I mistakenly believed that toeing them in towards my listening position wouldn’t do much due to the size of my living room and shape of my house. They truly fill my house with beautiful music from anywhere I am (depending how loud I turn them up) Anyways about a week ago I toed them in to my main listening position and lo and behold the right channel opened right up and the soundstage is much more balanced, with depth and just a huge improvement overall. I’m simultaneously delighted and annoyed I didn’t do this years ago! So please, do yourself a favor if you have gigantic speakers and haven’t done so yet, toe them in and reap the rewards.
I worked at an ESS dealer in 1973-5 and we had AMT-1s, Towers, and AMT-3 “Rock Monitors” on display, as well as Tempests and other lesser models. I never heard of these AMT-6 Professionals. When were they made? I believe you that they are awesome!