Imaging and soundstage

Sorry, Fluffy. I'm just the messenger. But since the Allison rule supposedly emphasizes the greatest difference between all distances, I'd think you're already off to a good start.

I'd recommend trying it.

-IMO

It seems that the consensus is the listening chair should be a minimum of 4 feet from the back wall.

Since your topic is imaging and soundstaging, you might also try moving your speakers around a bit. There's an Allison rule that seems to work quite well for speaker placement. That is: (All measurements from the front center woofer driver)

Middle distance squared = shortest distance multiplied by longest distance.

Implementing this rule along with toed-in speakers so the tweeters and midranges are pointed directly at the listener's ear could be an excellent starting point toward obtaining pinpoint imaging and 3-d soundstaging. And perhaps even the ending point.

-IMO

Sure, woofer front center is:

o 3.5ft from side wall.
o 2.0ft from floor.
o 6.0ft from back wall.

3.5 squared = 12.5
2.0 x 6.0 = 12.0

12.5 is pert near equal to 12.0

-IMO

Cosmic_void, I believe the Allison rule is a good general-type rule. The strategy of this rule apparently is to have the distances as different as possible.

Therefore, averaging between the two woofer would probably work as well as any other alternative. Although, I'd probably try applying the rule first with the lowest woofer.

I can only say that my initial speaker placement worked quite well and then I stumbled across the Allison rule in an old issue of TAS. My measurements turned out to be near exact. I've since mentioned this rule to one other person and now he claims he's not able to go to sleep at any decent hour as this application has transformed his entire musical presentation into another league. And he has Maggie 3.6 speakers.

-IMO