I've read on other forums, and seen plenty of products, that will testify to the benefits of mechanically isolating all your hi-fi separates. I can see the argument when it comes to record decks and turntables, as these have highly sensitive electro-mechanical devices that produce the source signal. However, what is the thinking behind isolating solid state components like an amplifier, DAC or streamer? I can't think of any reason why vibration at the tiny amounts experienced on a standard rack would feed back into distortion in the audio signal, let alone a digital signal output by a streamer or DAC. Perhaps if the components weren't soldered correctly to the board this could cause an issue as they shake about, or maybe in a power amp the vibrating of the power supply causes movement of the wound coil and generates small electrical currents at the vibration frequency, or what???? Is there any solid research in this area that shows the effect of vibration on solid state electronics output signals? Or is this just an imagined phenomena? On one forum I read that "mass-loading" a streamer (sitting a heavy weight on top of it!) had a night and day effect on the sound quality. Similarly, many people report "night and day" differences when sitting their Pre-amp, DAC, power-amp or external power supplies on products like Black Ravioli. I'm from a technical background, originally an Electronic Engineer, and we did a hefty dose of physics back in Uni. However, I just can't get my head round why these effects would be noticeable, and what is actually inducing them. I'm skeptical that there is any connection, but if someone can point me to the research I'm happy to be converted! Similarly if there is research out there that dispels mechanical vibration as means of creating distortion, I'd like to see that too.