Why will no other turntable beat the EMT 927?

@brunorivademar 

All i’m saying is that with regards to that particular measurement idlers seem to have an advantage because of higher revving motors and thus less motor cogging. 

I have refurbished a few Garrards. I also have a vintage Exclusive broadcast idler.

My reference TT for the past 30 odd years is a thread drive with 26kg platter and motor that dwarfs most  TT's. The large AC motor is driven off of a precision sine and cosine wave generator and separate power amplifier. It is superior to the idlers by some margin.

On the other hand I had a Platine Verdier for a while as a second TT - the idlers easily surpass the Verdier. I swapped my reference TT motor drive over to the Verdier and voila - there's the problem - pee wee motor.

Personally I believe the idler "sound" is not the idler drive itself - in my opinion it is the big AC motor drive that is creating that "drive". The removal of a rubber belt also contributes, but I think the big AC motor is the key.

The weakness in the Thorens 124 is the rubber belt.

The problem with modern TT's is that nobody produces quality AC motors any more. Both my reference TT and the Exclusive idler have AC motors the size of a fist - and they are dead silent - even with my ear right next to the motor spindle.

Finally when AC motors self correct for any lag, they do so in a sinusoidal fashion - DC motors when speed corrected do so in a saw tooth -  in other words speed recovery on AC motors is smoother and more benign.

@dover , there are many reasons your Garrard sounds better than your other tables besides the drive. I respectfully disagree with that terminology. A turntable does not have timing or pace for that matter. The music has that. A turntable just spins at 33.33 rpm as quietly and accurately as possible. A great turntable has no sound of it's own. Cartridge may have a sound of their own and IMHO those are the least desirable cartridges. The tonearm can certainly influence the sound a cartridge manufactures but again the best arms have no sound of their own and hold the cartridge rigidly with only 2 degrees of freedom. Coloration added to the sound my be pleasing to some people but it is distortion non the less.

Dear @brunorivademar   : Fremmer has been using for his reviews is pretty accurate.

Wrrong. In the thread where M.Fremer posted what I posted to you and where you posted several gentlemans discussed about that " accuracy " and the final result was that is non-accurated and that's why Fremer posted what I send to you and not for the reason you said.

Do it you a favor and read the thread where you posted.

R.

@brunorivademar  : " I would challenge any direct drive or belt drive turntable owner to share speed deviations and not many would be below +-0.20% Does it make any difference? I  "

Wrong again. What you posted in that thread specified: 0% speed stability and was you who posted on those 3 DD TTs you mentioned there and that I shared here.

R.

@brunorivademar  : " But the only thing I can think the 927 has in favor besides the high torque is the much lower deviation from a perfect 33.33 at ALL times.."

In this thread are posted the 927 specs. Look for and you will read how bad measures that EMT.

R.