I have two sistrum racks six shelves each. I love them. The resonance handling properties is real and works. Great soundstage from my equipment using these. The cosmetics are unique and innovative. I could frankly go on and on, but there have been a large number of threads here on the subject and a search under audio points and sistrum should yeild significant results. I looked at some of the other mfgrs. you mentioned and all have fine credible products which should be seriously evaluated. I found in most cases that they were attempting to duplicate some of the audio point technology invented by Brent Rhiel at Star Sound a number of years ago. Also, while using some reasonable approaches for resonance control such as sand or other materials the micro bearings developed by Brent really do a better job. He has integrated the micro bearing in the sonoran cable, which I have and the results are pretty good. I tried the racks without the micro bearings and with sand. In both instances there significant improvement in the sound of my equipment using them. Robert at Star Sound would probably be more than glad to discuss all this with them if you call.
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