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Cogging is theoretically an issue with all electric motors and since all the turntables I know of use them, no drive system can totally escape the problem. A turntable can be no better than its motor regardless how well the rest of it is made. Since the platters and motors on direct drive tables are essentially one, cogging should be a bit more of an issue but this is more theory than real listening experience. If an audible cogging symptom is experienced on a Technics or an other high quality turntable, I would blame a faulty motor instead of the drive system.
Good information!
Years ago, I was shown at an audio shop two turntables: a TOTL direct-drive [don't remember brand] and one of those quirky British Connoisseur belt-drives with clock motor. The power switch included a little rubber foot which literally kick-started the platter when you yanked the lever. If you did not give the lever a good yank, the thing just would not start. Oh, please ! Both tables had the same phono cartridge, and fed the same amp and speakers. Both played the same LP. The Connoisseur won out, and the salesperson explained that it had to do with the belt-drive being a non-cogging drive system. I don't know if he was correct or if it was snake oil.
Laz
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Welcome aboard. You are now looking at the objective reality: please stay focused.
Why, oh why, didn't I take the BLUE fez?!
But you keep looking over your shoulder to see if I am there.
TEAM Mac//TEAM STAX//TEAM MUSTAPHA//TEAM HORRI-FI//TEAM TOO MANY TEAMS
The dot for the speed ring does fade in and out (but it's barely perceptible). Are the +3 and -3 dots the ones immediately above and below the main dot? Does it matter if they are closer to +4 -4 dots?
by+4/-4 do you mean on the slider? if so thats totally OK. the numbers on the slider are just there for reference, the dots on the rim represent the actual speeds.
Originally Posted by Lazarus Short
The Connoisseur won out, and the salesperson explained that it had to do with the belt-drive being a non-cogging drive system. I don't know if he was correct or if it was snake oil.
the cogging effect of the motor has little to do with belt or direct drive but how the motor is built. belt drives are more tolerant of a jerky motor than a direct drive (which are completely intolerant) but FAR from immune from the ill effects. Teres audio has a good paper on why even a belt drive works better with a motor that cogs less.
the direct drive camp argues that the "short term" speed instability shown in the ittsy bitsy cogging is offset by the superior speed control compared to the belt drives when playing long notes and loud passages.
as an odd twist of fate and perhaps the pendulum simply swinging the other way, direct drives and idler drives are coming back into style.
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Originally Posted by mkmelt
ACHTUNG - ALLES KOPFPHONERLISTENERS
Alles kopfphonerlisteners non-technischens! Das tubenmachine is nicht for gefengerpoken und mittengrabben. Oderwise is easy schnappen der springenverk, blowenfus, und poppencap, mit spitzensparken, und smokentubes. Geverken inside der tubenmachine is fur der experten only. Is nicht fur geverken inside by das dumpkopfen. Das rubbernecken amateuren keepen das cotton-picken hands in das pockets. Just relaxen, enjoyen der musik, und vatchen das pretty glowentubes.
as an odd twist of fate and perhaps the pendulum simply swinging the other way, direct drives and idler drives are coming back into style.
Yes, indeed. I currently own one belt drive Dual, two direct drive Sonys, and one direct drive Denon [DP-11F, bought yesterday]. I was quite the belt advocate for years after my SL-1200 debacle. I can't see the need for idlers, however.
Yes, indeed. I currently own one belt drive Dual, two direct drive Sonys, and one direct drive Denon [DP-11F, bought yesterday]. I was quite the belt advocate for years after my SL-1200 debacle. I can't see the need for idlers, however.
Laz
Some of the idler people claim that they provide detail and dynamic slam beyond the capability of any belt drive turntable.They also sometimes claim that direct drive also has this same potential but a great one was never made due to motors being imperfect.
Some of the idler people claim that they provide detail and dynamic slam beyond the capability of any belt drive turntable.They also sometimes claim that direct drive also has this same potential but a great one was never made due to motors being imperfect.
Idler drives also provide squeeky noises if the platter & idler are not perfectly aligned. Given that the idler is usually mounted on a comparatively flimsy pivot, this is a very real problem. I have resorted to bending parts to get things into alignment. If the table is expensive, it is not an exercise for the faint-heated.
! Both tables had the same phono cartridge, and fed the same amp and speakers. Both played the same LP. The Connoisseur won out, and the salesperson explained that it had to do with the belt-drive being a non-cogging drive system. I don't know if he was correct or if it was snake oil.
Linear Mode
