I have watched all of your videos and ready to start.
But I have a question on your 38% rule. As in most living situations, you don't get to design your room that will be used for studio/home theater.
The room is 20x20x8
I installed the equipment three feet forward of the wall for two reasons 1) I need access behind the equipment, as I need to change cables and things, and to move things with ease 2) cooling, I have cooling pumping from behind for all my amps
Now, my question. When measuring for the seating , do I measure from the front of the center channel? Or do I still measure from the front wall, which is behind the equipment?
The way things are, measuring from the front channel to the rear wall, I have 200 inches. The place where my ears are is 106 inches. Almost dead center, which I am disappointed in, but not much I can do except start trapping the room.
The 38 percent "rule" (guideline really) is measured from the front or rear wall. I'll add that ergonomics is as important as acoustics. If you can't get behind your gear, or have room for friends and clients to sit, the room is useless. Further, the more bass traps you add, the less important these placement rules become. In an anechoic chamber none of that matters at all!