VPI Prime Sig/Lyra Delos / Feedback ...help!

I thought you said above that  the Allnic and the Delos aren’t jiving

thats the reason I suggested the current driven phono stage 

hood luck Willy-T

Are having any footfall problems as well (do you have to tiptoe around your phono setup when it is playing to avoid skipping?).  It is common to have footfall problems with suspended wooden floors and this can complicate the solution because solutions that reduce your feedback problem may worsen any footfall problems.  With a wooden floor, it is probably best to put the table on a wall mounted turntable shelf--that would reduce feedback that is coming from the floor (your floor is like a giant sounding board picking up vibrations from the air as well as from the speaker cabinet that is grounded to the floor) as well as any footfall problems.  As I mentioned before, you can also work to make any rack your table sits on less prone to shaking (attach it securely to the wall).  After you have a solid foundation for your table, you should then try various shelves and platforms designed to damp vibrations.  It is hard to say which will work best as this is a matter of system- specific tuning.  

@mijostyn @atmasphere @mulveling @lewm @tablejockey 

So I just bought a 2" butcher block that's (solid AF) & 4 IsoAcoustics pucks, mounted turntable , put stylus down on non spinning record at loud volume tapped around & a/b'd against no butcher block...don't really hear much difference 🤷🏻

@tommypenngotti You learn something everyday. I can slam my Sota with a mallet and you can not hear a thing. That is because the "butcher block" is hanging inside from 4 springs. Edgar Villchur was fascinated by the problem (which he also created with his loudspeakers) and Came up with the AR XA in the late 50's. It sold for something like $67.00 and within a couple of years everybody had one. They were outperforming turntables costing over $500. You could not get one to feedback if you tried and they didn't sound like an express train in the background. I never got an AR. My first suspended table was a Linn LP12. You need to get a real suspension platform. I am familiar with MinusK and Vibraplane. To isolate a turntable you have to use a mechanical filter, three of four springs tuned to a resonance frequency below 3 Hz. Bob your head three times in a second. That fast. You have to use springs just stiff enough to support the turntable.  

So I just bought a 2" butcher block that's (solid AF) & 4 IsoAcoustics pucks,

@tommypenngotti Just so you know, a 2" butcher block doesn't do much to kill vibration. If you bonded it to a substantial slab of marble or Corian (or other dissimilar material) the two materials could rob energy from each other and thus actually be able to absorb resonance.

I had a problem with foot falls near my equipment stand being audible despite some very nice anti-vibration platforms (I didn't have a problem with feedback otherwise). That was solved by placing bearings beneath the equipment stand, which relieved side to side energy.