Invert the speaker and sit on the floor?
Why do you think 6-8" is such a huge issue?
How far away from the speakers do you sit?
If you like the sound while you're walking around you are well above 6-8" higher than the tweeter's axis unless your height seated is only 16" less than your height standing, which would make you about 4' tall...
So, something other than the negligible difference between the height of your tweeters and your ears when seated is going on.
system details would help, obviously. What speakers?
Why do you think 6-8" is such a huge issue?
How far away from the speakers do you sit?
If you like the sound while you're walking around you are well above 6-8" higher than the tweeter's axis unless your height seated is only 16" less than your height standing, which would make you about 4' tall...
So, something other than the negligible difference between the height of your tweeters and your ears when seated is going on.
system details would help, obviously. What speakers?