14.5 by 20 and i sit 8 ft away.
If you wouldn’t mind I’d like to hear more about your configuration of the three F12s. That seems a bit unusual. Is it L : L+R : R? All three spaced out in front, or is one in the back, or?
My distance from the FR30’s is 10 feet with AUVA 100 isolators. I mention this because, even at this distance, the rear of speaker is raised about 2 inches higher than the front to get best tweeter/ear alignment. Just curious if you have made any amendments to speaker angle given your 8 foot distance.
I love the FR30’s, but they do ride tall in the saddle.