First look to see how much subsonic turntable rumble is getting through. If the woofers flutter a lot at high volume even with no signal, like on the lead-in and lead-out grooves, or between tracks, that’s one thing.
Also does this ever happen playing CDs?
If you have no problem playing CDs, and especially if you also have a lot of flutter, then yes you need a better platform.
Just not any sort of isolation platform. There is by the way no such thing. What there is is vibration control. This false notion of isolation makes people forget what is so plainly evident, that a box full of sand ain’t gonna isolate nuttin but it certainly will control and eliminate a lot of troublesome vibrations reaching your turntable.
Also does this ever happen playing CDs?
If you have no problem playing CDs, and especially if you also have a lot of flutter, then yes you need a better platform.
Just not any sort of isolation platform. There is by the way no such thing. What there is is vibration control. This false notion of isolation makes people forget what is so plainly evident, that a box full of sand ain’t gonna isolate nuttin but it certainly will control and eliminate a lot of troublesome vibrations reaching your turntable.