Sound is better when I stand up?

@holmz no headrest, but it is a wingback. I wonder if that's an issue.

@paradisecom Reference 3a MM Gen 2. I've had iterations of reference 3as for many years. They are in phase and the tweeters are on the outside.

@designsfx The speakers are 8.3 ft apart and my listening spot is 10 ft from both woofers.

I do appreciate everyone trying to help. This is more out of idle curiosity than any burning desire to rectify the situation. It could be that when I stand up I'm also getting the reflections from the back wall, whereas when I'm sitting down, those reflections are absorbed by the chair. It is a small room after all.

@holmz Ahhhh. Haven’t joined Audiogon and bukake in quite some time. Thanks for the reminder.

So - the culprit was my wingback! The two wings and its low seating profile managed to smear the sound. On the advice from @elliottbnewcombjr I temporarily replaced the wingback with a straightback that also seated higher and it made all the difference -- sounstage opened up; instrumentation much more 3D than before. 

Which sucks as my wingback is really comfortable! I put four sections of 2x4 beneath each leg to get equal with the tweeters, but that helped only so much.

Still, this will be a cheaper solution than almost any audio addition I can think of!

I would love to see a visual map of the soundwaves and how the wingback blocked or did something else to them. 

Hi all!

Cool. Let's recap:

@audioman58 I did mention the brand - Reference 3A MM Gen 2. Stock tweeters; I have ceiling corner foam triangle baffles but am now considering some ceiling  hanging foam frames

@mbmi swivel chairs. Huh. Good point. 

@grauerbar You're right. I mean, how much listening do I do on my feet? I have no mantelpiece upon which to lean with my tumbler. 

@holmz Great picture of my wife's reaction whenever she sees a new piece of audio gear I hadn't told her about. 

@bigwave1 Yes, I can adjust my stands by adjusting the spike depth. Thank you for the suggestion. 

@avanti1960 I had the 3As toed in slightly and now have gone back to the recommended no toe in. That did make a positive difference in the sound. 

To those who mentioned the triangular distance, I have gone with something closer to 1-1.2 ratio, like @tomcarr ​​​​@clearthinker suggested. That helped, too. 

Can't give up the wingback, though. It's so comfortable. 

@ebm Hey  - It gets the steps in...

@tom_guyette it would be the latter. It's plush and upholstered which means I'm definitely, according to your observations, getting some absorption mids and highs. 

@coppy777 Good point. When I had my listening room downstairs (see my virtual system), I placed section of 2x4s beneath each leg of my loveseat. It made all the difference