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Small room acoustics is not science it’s an art when you consider the amount of refinement audiophiles expect in there finished product.

This is a perfect example of the OP. There is so much myth and knowledge that is totally baseless in any sort of audiophile knowledge foundations that there is no way audiophiles can claw their way up the hills of acoustics, electronics, material physics, and psychoacoustics, as well as psychology to reach the relativistic goal of audio nirvana at your listening position.

I use a Lyngdorf MC 60-2 with their program called "Room Perfect" these guys are really on to something including psychoacoustics. Trinnov is trying to linearize the room, impossible when you understand how much we don’t know. I went with Lyngdorf because of this exact issue.

@mijostyn

I put a window too close to the right hand loudspeaker and somehow it was skewing the treble on that side. I had the window removed and the hole sided over, big improvement. I never would have known had I not measured it. I thought as long as the wall was reasonably flat it would be OK. I put blinds over the window and that did little to nothing.

I had a similar problem, rather than remove the window I did some creative room treating. This also was in line with Anthony Grimani’s "acoustic recipe" in the video I posted earlier. This is a 3D diffusor that has an absorber mirroring it on the opposite wall. As you see it doesn’t block the light either, win/win. I’ll post the measurements I just took after installing my new preamp later:

@mijostyn

In order to run Anthems ARC Genesis room correction I connected the digital out of the Paradigm PW Link into my Sony dac/pre. Look at these results (the green line is the after). Anthem has all types of products with ARC, recommend you replace the TACT. With your 4 subs and PJ the Anthem AV90 is worth checking out. To get the results you want you can’t rely either on DSP or room treatments, you need to do both (remember to treat the ceiling too). I know you have a PJ, look how I worked around mine using a similar solution. The result is more than worth the effort:

@mijostyn

The components of your system are like a Ferrari, but you are using a team of horses (the TACT) to power it. Yes, you have a lot invested in horses, you have used them a long time. It is time to let them go and get an engine suitable for your components. You have several members here who have already praised their own DSP (trinnov, room perfect, ARC, Audyssey Pro, DSPeaker, etc) and NOBODY is using TACT. It is a horse in the era of cars, time to get an "engine" more in line with your components. That system is from 2008 and if it was an amp or a pair of speakers, fine. For a digital component? No. A $100 DAC from today will blow a $5000 DAC from 2008 out of the water. "Digital Signal Processing" software that old is not even a consideration. If you need advice start a new thread and I am sure you can accelerate the transition, NP.

I finely used Room Perfect on my ProTools system, It came out much better than I ever expected, those new Genelec speakers are much better than I ever expected, nice when that happens.

When you set up your system then run  acoustic programs that fix the room to show a perfectly flat graph don’t think your room is perfect or even good sounding that’s not the goal in fact if your room is flat your room will not sound good, as I said earlier a famous acoustic designer and studio architect John Storyk said it’s very easy to make a flat studio but they sound bad. When the goal of most acoustic room fixing programs is to give you a flat line well logically that gives you a room that sounds bad, any other line gives you an argument for what may sound great but a flat line is the only one that you know for sure sounds bad. Room perfect by Lyngdorf is the only one that I know of that doesn’t conform the speaker to create a flat room. 
 

Small room acoustics are not hard to do correctly but impossible, sound is 3D the materials it bounces off of are all different and change with angle of the sound hitting the material and the absorption of the particular frequency hitting that boundary, and the amplitude of that sound hitting that boundary material. Acoustics and fluid dynamics are cousins in mathematics and both are done never in real world environments but in theoretical perfect boundaries and environments only hoping to get an average. DSP is great for surround sound systems but only adds latency for 2 channel systems, if you want your system to sound the same loud and quiet your brain will not understand, the Fetcher Munsen curve has been there all your life, it’s also different for everyone and especially different between men and women, how do they get low level loudness right, they can’t.