[78-L] TURNING THE TABLES, (was New Cheap Turntable

[Michael Biel]

  I think that rather than some of the other potential problems David
Burnham mentions it probably was a defective unit that JD had received,
especially since he says that others he had looked at from that brand
did not have a rising and falling turntable during rotation which is
what he said this one had.  That ALWAYS is a defect, and has nothing to
do with acoustic feedback from the speakers unless those are VERY strong
speakers!!  While DJs tend to like the straight arm rather than the S
shape I prefer, I think that DJ tables are designed for strength for the
rough usage AND TRANSPORT they receive, while audiophool tables, arms,
and cartridges are well known for the delicateness. But some of the
finest Techniques tables were used by dance DJs -- but were they
designed FOR them or used by them when they realized how good they were?
 

But any turntable could be delivered defective.  I also think that JD
should identify the turntable (and even himself).

Mike (not anonymous) Biel  mbiel at mbiel.com 


JD wrote:
>> Let me add that I was using an excellent cartridge, properly mounted
>> and that I'm experienced enough in audio and music (a professional in
>> both) to know what I'm doing and certainly what I'm hearing. 

From: DAVID BURNHAM <burnhamd at rogers.com>
> From your credentials, I assume you would have recognized if this was the
> problem but the effect you were hearing with your clarinet opening,
> (Rhapsody in Blue or Tchaikovsky's 5th?), sounds to me like acoustic
> feedback from the speakers to the turntable.  If you have a good sub-woofer,
> very low frequencies, even sub-sonics, can travel through your home's structure
> and you can easily see the tone-arm shaking and you will hear low frequency
> modulation of the clarinet sound as well as a significant amount of rumble. 
> I also can't see a turntable designed for the treatment it receives from
> disc-jockies being able to run smoothly with a high-compliance cartridge. db