The first three things that I would do are the following:
#1: temporarily place something in the corners, behind the speakers to absorb some of the sound eminating out of the corner (a tall plant, hang a large beach towel, etc. nothing permanent). Listen for change, if none, remove for now.
#2: place something under the rear of the speaker to angle it downward (or adjust the spikes accordingly). Listen for a lowered soundstage. Then add #1 back and listen again. Then remove if not satisfied.
#3: Toe in the speakers more, so that the speakers are just aiming at each ear. Listen, then add #1 back into the mix, then add #2 back as well into the mix, then leave #2 and remove #1.
If none of these items reflect any improvement, you will liekly need to play around a bit with moving the speakers in smaller increments forward and back, side to side. The toe in should help taking care of side wall reflecting and the forward tilting of the speakers should take care or change the reflection of the floor. Also, you can play around with just angling the upper module as well, either in conjunction with the bass module changes, which may be necessary to optimize to your goals.
Do you have the 4 JRs filled with shot? If not, I would do that, it definately helps in other areas and tightens the bass. Perhaps you have an undefined bass response and your have a couple of room issues that further magnifies this at different heights.
Also, you are sitting virtually against the rear wall, based on your measurements. What happens if you move your seat forward, combined with a bit more toe in?
#1: temporarily place something in the corners, behind the speakers to absorb some of the sound eminating out of the corner (a tall plant, hang a large beach towel, etc. nothing permanent). Listen for change, if none, remove for now.
#2: place something under the rear of the speaker to angle it downward (or adjust the spikes accordingly). Listen for a lowered soundstage. Then add #1 back and listen again. Then remove if not satisfied.
#3: Toe in the speakers more, so that the speakers are just aiming at each ear. Listen, then add #1 back into the mix, then add #2 back as well into the mix, then leave #2 and remove #1.
If none of these items reflect any improvement, you will liekly need to play around a bit with moving the speakers in smaller increments forward and back, side to side. The toe in should help taking care of side wall reflecting and the forward tilting of the speakers should take care or change the reflection of the floor. Also, you can play around with just angling the upper module as well, either in conjunction with the bass module changes, which may be necessary to optimize to your goals.
Do you have the 4 JRs filled with shot? If not, I would do that, it definately helps in other areas and tightens the bass. Perhaps you have an undefined bass response and your have a couple of room issues that further magnifies this at different heights.
Also, you are sitting virtually against the rear wall, based on your measurements. What happens if you move your seat forward, combined with a bit more toe in?