Will do. I've got the benefit of an unused PEQ band on each sub, so I can probably compensate for some modest FR issues if it gets the tactile response to a more balanced place.So the sub is currently firing to towards the right wall? Have you tried rotating it 180 degrees? May or may not do anything....
Yes, lowering the gain on the nearfield sub will indeed "mess" with your frequency response....how much is impossible to know until you measure. My guess would be "not very much".
Try playing a bass heavy scene and play around with the trim levels until it sounds/feels right to you, then measure to see where you're at. Try turning down the nearfield sub and turning up the farfield sub, or a combination of the two.
If that doesn't work, do you think rotating the sub to face the back wall is likely to make a difference?
My thinking was that it keeps the driver centered, but pulls the driver itself further away from the sofa, so in theory it'd lower the TR a bit, without eliminating it completely.