1-06-2024....A little over a year ago I picked up the Rockport Arrakis 2 speakers and CH Prcecision M1.1 Mono blocks. Also "newer" to my system is the Allnic L10000 preamp and Nordost Odin power cords, and I added some more acoustic treatments to the walls. The room is serviced by a dedicated Equitech sub panel with seven dedicated lines feeding the room with balanced power.
The recent addition of these little plug in wall conditioner/filters from Nordost and the Puron are very worthwhile tweaks.
8-19-2015....System totally rebuilt from ground up. Moved to a larger room in basement. Room is 18'x 31' with 10' ceilings with seven dedicated circuits feeding into a dedicated wall mounted Equi=Tech subpanel.
4-30-2019.... Finally added proper room treatments focussing mostly on diffusion. All products from GIK Acoustics.
Thats a nice room and a sweet system. As far as treating that front wall goes, have you considered some carpet padding and covering it with a nice carpet like the all of the casinos and nice hotels use or even some nice thick drapes? Good luck!