The "middle of the room" would only occur in a square room. In most rooms (say 14' by 20') they will be about a third of the way into the room. As far as distance between the speakers, that doesn't matter so much in the super-near field listening position recommended by Cardas, but I think most us are happier with the listening position Jim recommends, and the Cardas method may not be compatible with that,if you religiously follow Cardas method, it will put the speakers either right in the middle of the room (.447) or they are too close to each other (thus narrowing down the soundstage). I have never found it effective in my room.