main live room here is 13' x 20' x 30' ,we love it! sounds like music
our other room 13' going to 15' x 45' x 60', that sounds wonderful too.
I had 17 foor ceilings in another spot, and 9 foot in another (a home)
these rooms sound better, I think 13 is a good height.
BUT.....
ethan knows much more than I...
