Room layout (plan)

I sense there’s limited placement options from the side walls due to screen size?

I’d usually advocate for keeping the front right and left the same distance from the front wall and also the front right and left the same distance from the side wall, but not having the distance to the front and side walls be the same.
That said, a few inches difference between the front and side wall distances probably won’t matter much. Symmetry will also usually matter for stereo imaging, but perhaps not as much with the dimensions provided. Remember too that SBIR cancellation frequency is calculated from the cone, not cabinet distance, if you’re going to give this more thought.

On the plus side, having the speakers that close to the wall gives you an advantage in counteracting the SBIR because the cancellation frequency will be higher and its easier to absorb higher frequencies. 4”-5” Bass traps should help if there’s room for them.

If choices are limited the best course will probably be to put them where you want or need to and then measure. Move them within the area you have until you get the best response and go from there with room treatment options. Audyssey on top of that.
From the cone………ok then, since my fronts are 15” deep, then I should place them 2 feet (backside of cabinets) from the front wall, or move them around until I get satisfactory readings from my DRC graphs.
Would that work?
 
From the cone………ok then, since my fronts are 15” deep, then I should place them 2 feet (backside of cabinets) from the front wall, or move them around until I get satisfactory readings from my DRC graphs.
Would that work?
Moving them around in the area available to get the smoothest reading, yes.
Will you be using DRC graphs or REW?
 
I am not so sure that they would be 15" deep into the speaker cabinet (box)... Is it a 15" woofer in the cabinet? And I would suggest you point your mic to the center of the L & R speakers and take some REW SPL readings... Not so easy to point you mic at the center of each speaker cabinet and get perfect readings... I would try to get your L&R speakers intro an a symmetrical position and move your subs around into an asymmetrical position...

DRC mostly below the Schroeder frequency as appropriate...
 
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Will you be using DRC graphs or REW?
I’m not sure since I’ve never used DRC before, but I’m equipped (my UMIK-1 microphone arrived today from Amazon), and my AV receiver has audessey.
Since I’m a novice (obviously) should I use both graphics and REW?
Is it a 15" woofer in the cabinet?
The speaker dimensions indicate about a foot wide X 15” deep X 41” high
I’m guessing woofer is slightly lower than 12”

Off topic; right now I’m in Todd Anderson’s neck of the woods (working in Baltimore Maryland)
 
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