In an Audiogon discussion I came across the “Allison Rule” of speaker placement. The poster described it as follows:
The Allison rule basically states that the distances from the woofer to the floor, woofer to the side wall, and woofer to the back wall should be as different as possible. To accomplish this, one would apply the following equation:
Middle distance squared = shortest distance multiplied by longest distance.
Example:
22" (floor to midpoint between woofers, a fixed distance)
57" to side walls (about as far as I could get without bumping furniture)
36" to front walls (the "middle distance")
Compared to Cardas and a couple other formulas, this one seemed to offer a better compromise with practical furniture placement needs (in a space that is not a dedicated listening room).
The Allison rule basically states that the distances from the woofer to the floor, woofer to the side wall, and woofer to the back wall should be as different as possible. To accomplish this, one would apply the following equation:
Middle distance squared = shortest distance multiplied by longest distance.
Example:
22" (floor to midpoint between woofers, a fixed distance)
57" to side walls (about as far as I could get without bumping furniture)
36" to front walls (the "middle distance")
Compared to Cardas and a couple other formulas, this one seemed to offer a better compromise with practical furniture placement needs (in a space that is not a dedicated listening room).