Glenn and Ethan;
All I have to do is thank you for the attention and precious information here and on Real Traps and GIK website.
In fact, in my room,these are basically the only wall points at ear level(wider than 2') not treated yet.Then , will be 20 traps
My RFZ (broadband/only fabric) side panels are placed based on the "mirror technique", I just wanted to be sure that this "directly beside" side panels could be "paper/cardboard faced".
I tried placing some panels I temporalily took out from rear wall...and these "cardboard faced" panels seems works and improve bass decay of width mode - as expected- ~120 and 240 principally,and improves the stereo image even more
Things are going pretty well here, just want to improve all I can...
Ciro