The holders are top processed and made very massive. I have 2 different holders and boxes suspended -can so good compare. These glands are only 2 out provided on the rather small plate to the wall mount box -dafür is very large and has at least 8 Bolt Down -Here slots. Everything as I said is solidly constructed and fairly accurate. Unfortunately, results from the joint with a heavy box -8.9 Kg JBL ES 30 is always an extreme tendency to "hang" -the box can not straighten and hangs down just always something wrong. And although the manufacturer the holder frees up to 15 kg. So I then yet taken a different holder for the ES30 and the smaller rear surround -in my case JBL ES20 with about 4.6 Kg so hung-unfortunately do these a little -but it goes. Do not get me wrong -the bracket is very stable and also 15 kg boxes are certainly not crash align perfectly -only they can no longer be correct because they box up getting a few cm "hanging" -in my case at the Rears not so bad because the slightly elevated hang and "look down" anyway -but something to the front speakers I wanted it not real -sah wrong and has everything very "rumgeeiert" in all the larger box. My conclusion: Well done holders -but not for boxing greater 5-7kg if you want to align them properly.
