So I was playing around with
Room EQ Wizard and thought I'd pass along my findings to you fine people.
My subs are currently, more or less, 4.5' to 5' from the front theater wall, right up against the left and right side walls.
60" and 60"
View attachment 542120
As it turns out, that's pretty much bang on perfect as it's 1/4 of my rooms total depth of 20'. I'd like to lower that peak at 28Hz but as you'll see, it looks like it's there to stay regardless of location (I'm assuming it's something to do with room dimensions). I'm also planning on playing around with it to try to lift the decline from 30 to 68Hz but I'm not sure if that's going to be possible. Perhaps in my receiver's EQ settings.
0" and 0"
View attachment 542121
Shoving the speakers into the front corners brings the decline up nicely but produces a dip around 70Hz. Slight problem - that's where my left and rights are. Not an option as they can't move.
Left wall, front and rear cornersView attachment 542122
Hugging the left wall, tight into the front and rear corners, yet again, maintains the spike at 28Hz and helps with the dip at 70 but, as before, the left speaker can't move.
60" and 60", diagonal corners
View attachment 542126
Sixty inches from the front-left corner and 60" from the rear-right corner gives an abrupt, but not terribly deep dB-wise, cutoff from 47 to 49Hz. The abrupt dive from 75 to 80 Hz isn't ideal, either.
61" and 42"
View attachment 542123
Curious to see just how much difference it makes for placement, I located them back at the (at least for now) best spots - along the left and right walls, 60" from the front wall and tweaked them 1" and 18" respectively which produced the most dramatic cutoff of the group - absolutely nothing (at least comparatively from the 80dB spike at 57) from 61 to 62Hz.
As the real estate adage goes: "location, location, location!"