bro im planning to buy and use also the am-40 for my b&w 686. how heavy is your speaker? the 686 weights at 4.5 kg takot ako baka mahulog, now after reading your thread i will use blutak and 3m as well pero ang 2nd issue ko naman ay ung mismong screws makalas sa wall. how is your speaker holding against the wall?
the 686 is relatively small, even smaller than the RB-51 if if im not mistaken and it weighs 12.1 lbs so thats roughly 5.5 KG. as to how its sticking to the wall, the screws that come with it aren't short and the whole mount is rated to support much more than what a
pair of BS will weigh let alone one of 'em....not unless you are thinking of placing M40.1 Harbeths on a mount ( I'm joking --hehe).
About the blutac and 3M...actually you can do away with the 3M, its an overkill, with the amount of blutac that i used i could lift a speaker and the mount will stick to it if it weren't screwed to the wall.
good luck.
