I have Yamaha HS80M speakers and possibly Mackie 824's I'd like to mount on my wall. They're both about 9" wide, and 11" deep. The Mackies are heavier, at about 33lbs each. Seems like Vogel VLB200's might do the trick, but I don't want to order them from Europe. Thinking abut B-Tech BT 77's, and read some threads about them, but not feeling secure with the side clamps. Any ideas?