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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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In Reply to: In support of your wall mount.............. posted by Chuck Y on November 10, 2004 at 08:59:00:
> Even should the walls be in contact with the floor the vibrations
> will be reduced by having to pass thru many different types of
> materielA typical structural-borne vibration of 50Hz has a wavelength of about 130 feet; whether you place your turntable on the floor or the wall makes no difference to such a wave.
> Of some interest to me, although I have never seen a study on it,
> is how much vibration passes thru the springs of a suspended TT
> which is not isolated in SOME mannerIf it has a spring suspension then it is isolated. And the study you're looking for can be found in any undergraduate physics and engineering book.
> I think one of the reasons that John might like his TT set up
> without additional vibrational protection is that it needs to be
> able to bleed off internally created vibrationsWhat do you mean by "additional vibration protection"?
No, there are no internally created vibrations -- who would create these in the first place?
Lastly, there is no physical concept of "bleeding off" vibrations. As far as I can tell this term was coined within the hi-fi community by people who had no passing acquaintance with physics but wanted to give their product a sheen of scientific acceptability.
> What I loved was his comment below in which he unabashedly, without
> any support, denegrated off the plinth motors as being the worst
> design possibleNo, I was referring to the practice of using very low power motors to spin the platter, allegedly because low power motors would transmit fewer vibrations to the platter. There is essentially no scientific basis for this claim; motor vibrations are determined by the design and construction of the motor and have very little to do with its power output; in fact, the smoothest motor I have ever measured was a 10"-diameter, 50-pound jewel that required a controller bigger than my power amp. The only thing an underpowered motor can achieve is introduce speed variations, a condition that the original poster said was very sensitive to.
John
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Follow Ups
- For the record - John Gratsias 12:25:40 11/10/04 (0)
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