How far from the back wall are your speakers?

This depends on the design of the speakers.

My preferred distance would be 1/3rd into the room, with my listening position 2/3rd into the room. In my room 1/3 is not feasible for the speakers so I use 1/5th the distance and 2/3rd for the listening position. This was the starting point, and small adjustments from there were needed to dial it in.

I am using Wavetouch Grand Teton speakers as LR main speakers in 15'w x 21'L x 8'h room. 3ft from the wall to back panel of Grand Tetons. My ears (listening position) are 11ft from tweeters.

That's the front wall; the back wall is the one behind your head. Mine are 30 inches from the front wall.

The backs of my speakers are 6 1/2" from the front wall which makes the front of the speakers 23" from the front wall. Having a smallish room (10' X15') precludes optimum placement yet I still get pretty good sound.

All the best,
Nonoise