Consider putting the AV rack under the stair and putting an acoustically transparent screen wall up where your stair wall juts out. Shorter run to PJ, line of sight for remote, gets it out of floating in far corner. Speaker wires for LCR can be sleeved through short wall through a data ring and plate.

The screen wall idea will allow you to reduce corner loading your speakers and provide concealment of subs, speakers, bass traps, diffusers, corpses, whatever. The right channel should have some form of absorbtion placed on the adjacent wall to reduce reflected energy. Your left channel has little reinforcement once moved out into the room. Attenuating the right reflections will help balance your channels somewhat. The rear wall is pretty close. You may want to bump your seating ahead a bit and get some panels opposing your surround locations from the leftside. Treat your right wall with 3x 3" thick roxul absorption panels total.

Last edited by Serenity_Now; 11/24/16 01:18 AM.