Hello Bob,
Sorry I took so long in responding, Thurs-Friday were spent dealing with a water leakage in my main floor half bathroom. Everything's now not leaking and under control but I had to get my homeowner's insurer involved to repair the damage.
Unfortunately for you, I think slaw has a good point: "
If you get a sub/s, you have no good choices for optimal set-up." I like fireplaces and large windows in a home, but they can sure make things difficult for optimally positioning everything for good audio/video systems.
But I still think 2 subs will perform and sound much better than one, we just need to figure out how best to incorporate and optimally position them in your room. What do we do when the going gets rough? No, we don't give up and quit. We keep searching for solutions, out of the box if necessary.
Awhile back on this thread, bigwave1 suggested Syzygy subs that are reasonably priced, can operate wirelessly and have received several good reviews. Here's one of the review examples I found and read:
https://www.tonepublications.com/review/syzygy-slf-850-subwoofer/ If you have a smart Apple or Android cell phone, this could be a very good solution for you, no cables to run plus you can use your phone as a remote and for taking advantage of their room correction capacity at your listening seat after optimally positioning both in your room utilizing the crawl method.
If you agree that a pair of the $800 Syzygy SFL-850 subs are a good solution for your room, I suggest you still start at the right front corner of your room, just to the left of the door to your laundry room and garage, and proceed in a counter-clockwise direction when using the crawl method to optimally position sub#1. From my experience, I expect this optimum position to be along your short front wall where your equipment rack is located, but I can't be certain, so your goal is just to position sub#1 where the bass sounds best to you (powerful, dynamic, detailed and natural) with the volume initially set at about 50% volume, the crossover frequency set at 40 Hz and the phase set at "0" (in-phase).
For sub#2 positioning, just repeat the same procedure continuing around the room from where you positioned sub#1. I have no expectation where sub#2 will sound best in your room, so I'd just recommend taking your time, listen closely and trust your ears.
I should let you know that I've never heard any Syzygy subs but from what I've read, I think they seem like a good option for you to try. If you're interested, I suggest you contact Syzygy and see if they offer a free in-home trial period for a pair to audition them. I really like these types of offers since they take almost all the risk out of buying them. Please let me know your thoughts.
Tim