sixfour3:
You're welcome. Happy to have helped. You have a really good handle on the situation, too. The vast majority of vibration control problems are generated within the component itself. A lot of guys miss this so congratulations are in order for figuring it out all by yourself.
What is always happening, not just with turntables but with everything, the component generates its own vibrations. They travel down the feet into the shelf or rack or floor or whatever. What exactly it is really does not matter. Some find magical properties in concrete. Sorry, no. Carbon fiber is way better but even that has been demonstrated nowhere near as effective as isolation- and springs are the best isolation.
All these different things, none of them eliminate vibrations. Every time we try and do that all we wind up doing is having a different set of vibration characteristics. We shift the energy around the spectrum. Ultimately it remains and colors the sound until finally it dissipates.
What you have just measured then is this: In the beginning you had a tiny little bearing rumble that would have been inaudible, but for the sad fact it was at just the right frequency to excite sympathetic resonant vibrations in the shelf and rack and everything else around the turntable. All of it, and you could knock yourself out trying one thing after another in search of the culprit. If even it was just one thing. Probably not. Now the bearing is making just as much vibration, but being on springs this stays within the turntable which has been designed (we hope!) specifically to dissipate and attenuate exactly this sort of noise.
This same principle applies to every single component. Every single one. Tube amp, DAC, speaker- speaker cables and power cords, even! Think about it. Think about the tremendous improvement you can see and hear just from this one thing. Now imagine doing your whole entire system. That is what I have done. Now I bet you can understand why.
Thanks again to @millercarbon for his advice. This has to be simultaneously the cheapest and most effective fix for an audio problem that I’ve yet come across.
You're welcome. Happy to have helped. You have a really good handle on the situation, too. The vast majority of vibration control problems are generated within the component itself. A lot of guys miss this so congratulations are in order for figuring it out all by yourself.
What is always happening, not just with turntables but with everything, the component generates its own vibrations. They travel down the feet into the shelf or rack or floor or whatever. What exactly it is really does not matter. Some find magical properties in concrete. Sorry, no. Carbon fiber is way better but even that has been demonstrated nowhere near as effective as isolation- and springs are the best isolation.
All these different things, none of them eliminate vibrations. Every time we try and do that all we wind up doing is having a different set of vibration characteristics. We shift the energy around the spectrum. Ultimately it remains and colors the sound until finally it dissipates.
What you have just measured then is this: In the beginning you had a tiny little bearing rumble that would have been inaudible, but for the sad fact it was at just the right frequency to excite sympathetic resonant vibrations in the shelf and rack and everything else around the turntable. All of it, and you could knock yourself out trying one thing after another in search of the culprit. If even it was just one thing. Probably not. Now the bearing is making just as much vibration, but being on springs this stays within the turntable which has been designed (we hope!) specifically to dissipate and attenuate exactly this sort of noise.
This same principle applies to every single component. Every single one. Tube amp, DAC, speaker- speaker cables and power cords, even! Think about it. Think about the tremendous improvement you can see and hear just from this one thing. Now imagine doing your whole entire system. That is what I have done. Now I bet you can understand why.