I think he means just that randy. 2 of the 2x4 panels in each corner, 1 on top of the other, covering your corner bass traps. Diffusion in front of absorption. Makes sense.
Regardless, its no issue to bring over all (4) 2x4 panels. Maybe stick my white ones on your rear wall, and put your dark painted ones over the corner panels as Dave describes to keep the look.
Dave, if we were to stack the 2x4 to the ceiling...where would the other panels go? Randy's stealth traps are in the corners/of the corners/are the front wall corners & you mention putting a 'single panel in each corner' in addition to the stacked ones.
any clarification is appreciated.
i'm trying to get the Mini+Sandwich+Tranquility set up at Randy's tomorrow.
matt