2. analog
  3. 1290217449

How to eliminate TT feedback/vibration

1st Thing I will tell you - I have an OLD TT. It's a Pioneer PL-71. ( I'm looking at a Clearaudio CMB ) My TT is placed out in front and to the left of my left speaker(per Jim Smith's book.) I made a platform of MDF attached to the wall where my TT sits. At no point does the platform contact the floor. When I play certain albums-several in fact, at mid to high db levels, I get either an acoustical feedback or vibration feedback from low hz. I have tried to isolate my TT using something like sorbuthane balls and foam. I have not tried any of the commercial cone devices advertised. (Do they really work and if so-what's the best product?-no salesmen please). I don't know if my problem lies with my TT, or my platform it's sitting on. I have a friend who actually hung his TT from the ceiling years ago, and I may have to do the same. Thought I would inquire if anyone knew the answer before I started experimenting. Will a higher end TT like the Clearaudio cure my problem? Is it the platform I made-or do I simply need some isolation cones?
handymann
blkadr
739 posts
 
A sub sonic filter my be needed. As for vibration control "crap", cones could be of great help. I have seen them help in the same situation. I'm not recommending spending a fortune on exotic stuff. You might want to try a set of Dayton dss4 speaker spikes from Parts-Express as feet for your TT. They are really just big brass cones. They are two piece for leveling, but I would screw them tightly together. Use 3 or 4 of them with a tiny bit of adhesive to keep them in place. Worth a try for $15.
Another thing you might consider is removing your dust cover and just placing it over the TT when not in use. The cover seems to pick up a lot of vibration.
wilson667's avatar
wilson667
93 posts
 
Two things you could also try. You could mount the shelf to an exterior wall it should be less resonate and if you are feeling handy you could build a TNT sandblaster both have worked quite well for me. http://www.tnt-audio.com/clinica/diyracks.html
mingles
796 posts
 
What device do you recommend for a rumble filter? Of course, some phono stages have it built in, but if the one you own doesn't, what do you recommend?
stringreen's avatar
stringreen
6,468 posts
 
Are you sure your cartridge/arm interface is correct? What cartridge are you using?
4est
507 posts
 
What exactly is your wall shelf design- no offense.

Otherwise maybe just change where it is at on the wall a little as it may be at a resonance frequency. A photo would help a lot.
More to discover