Rap wrote: alfonso wrote: avole wrote: alfonso wrote:
...by the way,who is Michael Fremer????!!!!!??
mmmm.i doubt he's qualified to cover that position!
A tt reviewer who states that a dd drive is always haunting the right speed and that a fully analog motor like the sl1200 is causing jitter is obviously missing even the most elementary knowlege about tt's.
Also,about cogging...you can search in every science book and will find that it exists in every motor spinning.it's impossible to cure it completely and is present in every kind of turntable. Is like a magnetic field:you can isolate it but is impossible to interrupt it.Of course the better the tt motor,the less cogging.If you look carefully (and i mean carefully) at the strobe of a 150$ dd dj table like gemini's and the like,you'll see the dots moving a little onward and then a little backward...a weavy movement:that is cogging. Look at the strobe of a sl1200 tt: rock solid speed stability. Is possible to hear wov or flutters invisible at the strobe? Nope.Reason to worry: zero.
Cogging is still present,in every tt being belt,direct or idler drive.
Cogging is worse the slower the motor is spinning, on a high-speed motor the motors inertia tends to filter out the cogging. An idler motor typically spins at 1800rpm compared to a direct drives motor spinning at 33 1/3 rpm. This is why people talk about cogging with a direct drive. Whether it is audible or not is another matter.
I believe the " dots moving a little onward and then a little backward."
is called hunting.
Ok,thanks for your input.
But slower motor speed has always been regarded as a solution that could lead to a superior speed accuracy and stability (way lower wow & flutter).
So a faster motor (belt/idler drive) has less cogging but more wow & flutter.
A slower motor (direct drive) has more cogging and less wow and flutter.
There isn't a solution that can cure everything for what i can see.
But,while cogging is invisble at the strobe on good machines,the same thing can't be said regarding wow & flutter wich are visible by looking at the strobe. So more audible.
So why people like Framer talk bad about dd?!
The only answer that came in mind is that he's doing that baselessly...or to cherish his "audiophile" status against popular machines used by common people