they are 21cm from the back wall i do not get any boom *smile* but the video's i did sounds like they are booming then i used my ipad to film the video's which has not made the sound that greatplastic penguin said:Congrats. It sounds the dogs. Love the aesthetics of Yamaha too.
I'm slightly puzzled: Looked at your pic, how do you not get boom from speakers that close to a wall? My PMCs are about 24" from my wall which is fine. Any closer, though, and it loses its sonic integrity.
Nevertheless, pukka looking set-up. *good*