Distance from the speakers to the seating position

Generally speaking, rule of thumb I initally use is to be at apex of equallateral triangle & adjust from there for solid central image. I find my speakers central image sound slightly better if I sit slighty back of apex of eqilateral triangle. Try to be as accurate as possible. Adjustments of an inch or two are audible. Is easier to measure twice & move once during setup. Good luck!

As a starting point I use a 10 to 11 ratio (10 for the distance between speakers and 11 for speaker to listener position). Probably pretty close to Beavis' recommendations.

also depends on the speaker- i.e. most of Coincidents' models use a twin midrange setup, or D'Appolito arrangement. You need at least 8 feet from the speakers for proper driver integration...