Kerry, I've gotten a bit of mileage from the Allison rule as described in TAS issue 127.
There the author describes the rule as follows:
"The distance from woofer to floor, side wall, and back wall should be as different from each other as possible and as a rule of thumb, the middle-sized distance squared should be close to the figure you get by multiplying the largest and smallest numbers."
It's a very general rule but it's gotten me about 2/3rd's of the way there. Beyond that, it took about 6 more months of moving my speakers every so often 6 inches this way or 3 inches that way until I became quite content with what I was hearing.
-IMO
There the author describes the rule as follows:
"The distance from woofer to floor, side wall, and back wall should be as different from each other as possible and as a rule of thumb, the middle-sized distance squared should be close to the figure you get by multiplying the largest and smallest numbers."
It's a very general rule but it's gotten me about 2/3rd's of the way there. Beyond that, it took about 6 more months of moving my speakers every so often 6 inches this way or 3 inches that way until I became quite content with what I was hearing.
-IMO