4 and half feet from the back wall. My room is 10 feet wide and 16 feet long. More o less according with Mr. Cardas method. Works fine for me.
How far away from your speakers are you?
I thought it would be interesting to know how people position their speakers... do you have the freedom to put them where you want or do practicalities dictate?.. How far away are they from the listening position?.. How big's the room and how far away are they from boundary walls? My main speakers (Seas A26) are 1' from back wall, 3' from sides in a 14' by 20' room and my listening position is about 16' from the speakers. Just wondering how much floor space we're willing to give up to get the optimum placement.