Not the most sophisticated drawing I've ever done for sure.
Subs are equidistant from me, one in front, one in back.
Unfortunately, REW SIM doesn't allow multiple crossover points between 2 subs. Front sub is crossed over at 160hz and the rear at 120hz. I had to work with what I have. I'm on a PC with active speakers so I don't have any fancy DACs or AVRs. I use my soundcard to control the main cross over and then split the sub connection. My main sub can handle up to a 200hz crossover (no need to go that high), but rear can only do 120. It's not a very good sub. Main sub is 12", rear is 6". Front/rear volume ratio is roughly 3:2 (no markings on either sub to know what it's actually at, and I don't have the tools to properly find out either).
My system is calibrated to 83dB summed. So I use the windows volume control so the ratios stay in tact. No delays, Both subs are in phase though set at 180 for some reason. Doesn't matter though results are the same. One sub is ported (main), the other sealed.
Took me a lot of tests to make it integrate well. Right and left sidewalls gave similar results but not as good. I preferred the sound of it behind me. No localization though which is nice. A bit more depth, if you ask me, having the higher cross over.
Room sim isn't very accurate because there are way too many variables at play that will determine the final outcome.
2 of the 4 walls are exterior, made of stucco, others are standard 5/8" sheetrock. Floor is raised 4" off the old floor (I suspect that was done because it's probably asbestos tiles), concrete slab, 4 windows probably leak sound, closet is 52" wide, 36" deep. Quite a bit of treatment.