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Why do my bass drivers shake violently listening to vinyl

Hello Gon'ers,

Help needed. I took the grills off my new Vandersteen Treo CT's recently and noticed that when listening to vinyl, the bass drivers shake violently, meaning the amount and frequency in which they travel in and out. Then I played the same pieces of music from Tidal and they were relatively calm.

Is this some kind of feedback loop causing this? Has this happened to anyone else?

Thanks!
Joe
128x128audionoobie
artemus_5's avatar
artemus_5
1,962 posts
 
Different signal from each. Vinyl putting out more bass than digital. The question is how does it sound? Is it distorted? If so, then you may have a problem. 
audionoobie's avatar
audionoobie OP
361 posts
 
It sounds incredible! I'm just concerned that I may be doing damage to my speakers. 
melm
1,082 posts
 
You likely have a mismatch between cartridge compliance and cartridge/arm mass.  Do a search.
williewonka
3,075 posts
 
@audionoobie - Some questions:
  • Do the woofers visibly pulse in and out i.e. you can see the movement
  • Is the "shaking" consistent for every album
  • are the albums warped, so the pulsing matches the album warps 
  • is the platter free from warps
  • is the bearing in good shape
  • is the stylus clean and in good condition
  • what kind of stylus are you using
  • does your phono stage have a sub-sonic filter
Take a read of this thread
Phono-pre: subsonic filter on or off ? | Audiogon Discussion Forum  

It might give you a clue as to what is going on

Good Luck
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