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In Reply to: it depends on the room, the location of the tt, and the tt. posted by mikel on May 4, 2007 at 20:55:15:
Like John said it is a open loop. Once it starts it can cause your cartridge to go hopping violently. It just feeds upon itself. You literally run to the preamp to turn the volume down. You just have to learn how to decouple things to solve the problem.
Follow Ups:
impression that the source of virbations were only airborne, the solution didn't involve relocating the TT or anything to specifically target airborne vibrations.
No Guru, No Method, No Teacher
no doubt airborn vibration can be a big deal......but not in every case.if one has not resolved floor born vibration (not just from the music feedback) how can one isolate the effect of air born vibration?
IMHO floor, rack and a tt's own inherent resonance are dramatically more significant than the effect of airborn vibrations. once those things are solved (however difficult or spendy) Lp performance is a wonder.
I had that problem when (really!) blasting... eventually, after a few also-rans, I hit upon an isolation solution.Interestingly when in that state I placed my hand on top of my 100lbs (each!) speaker... it literally felt like it was jumping off the gound. Glad that problem is behind.
No Guru, No Method, No Teacher
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