Vibration Control

Nothing else needs these devices.., the sources main speakers and sub woofers and very sensitive playback … turntable nothing else 

@badbruno

Not my experience. I put Vera-Fi VBHs under my kit one set at a time, listened then added the next set listened and so on...

I first put Vera-Fi VBHs under my Audiolab 6000 CDT to amazing affect (we’re on the same page there) followed by my EVS 1200 class D amp> Audio Alchemy DDP-1 DAC/Pre> AA PS 5 optional outboard power supply, itself a huge improvement, then my Emerald Physics 3.4 open baffle speakers which do vibrate quite a bit, and there too big benefit

HTH

The main thing here is to audition it and see if you like the result. If you don't, return it. But why dismiss something out of ignorance. I've tried things where I liked what they did, and things that I didn't. I tried some Walker Audio brass/lead discs that seemed to deaden the sound when placed on equipmemt. I got a 5" thick maple board to put under my turntable and it did a remarkable job of opening up and clarifying the midrange. 

It's cool just to try and experiment. Maybe you may not understand why it makes a difference, but it really only matters that it does or it doesn't. 

It always has a positive effect, the key question is how much does it improve the sound you hear and how much does it cost and are you willing to spend. Anyone who denies it either is just plain stubborn of cannot hear properly. Or maybe their equipment is somehow already isolated well enough for it to not make much of a difference (highly doubtful).

It is the easiest thing to test/compare. In my experience, I've had the most improvement with my turntable (by far the biggest change), then my speakers, then my amp and lastly my preamp. Supposedly, it even helps with the a power/line conditioner, but I haven't reached that deepest end of the insanity yet (or fuses, or contact fluid or super expensive cables).

Meant to say least with my phono stage. My amp is integrated.