they don't do jackshit, imo. I kicked down 68 bucks for an Schoeps A20S to mount my dpa cmxo in. I had a couple of stand bumps during los/del and hear 'em the same as I think I would have without the mount. Waste of cash. For acoustic music, won't help at all, and for loud as shit electric music, you probably won't hear it anyway unless the shit is totally fallen into. At McPanic 4/12 during blackout a beachball full on hit the mbhos clamped onto my stand, just missing the dpas and moving the stand. You can barely hear it with phones, and if you didn't know where it was, you couldn't find it. That was with the dpa bar screwed right onto a low pro running about 5'10".