Did anyone answer the OP's question about how to measure the speaker distance from the back wall? I saw a few responses that mentioned driver to driver for the distance apart, but I'm curious about how to measure distance to the back wall myself.
FWIW - I've used all sorts of measurement and placement schemes. I do not like equilateral triangles or the Cardas method (requires a too perfect room). I do like the basic premises of the 83% theory, the Audio Physics method, and the Sumiko Master set (in some way I found this similar to the Audio Physic method). As mentioned, these are good places to start and fine tune from there. Some good reading on the Decware site as well.
FWIW - I've used all sorts of measurement and placement schemes. I do not like equilateral triangles or the Cardas method (requires a too perfect room). I do like the basic premises of the 83% theory, the Audio Physics method, and the Sumiko Master set (in some way I found this similar to the Audio Physic method). As mentioned, these are good places to start and fine tune from there. Some good reading on the Decware site as well.