Why will no other turntable beat the EMT 927?

All one can say when Mijostyn pontificates on one of his gospel truths is “l disagree” and then say why. My highly tweaked Lenco does not produce audible rumble of any kind. But I can’t say why. Mijo has to open up his mind and listen to a well restored idler.

@brunorivademar , idler drives ALWAY rumble more than any other drive type. and if you had corrected subwoofers you would know that. That is one of the big reasons they virtually disappeared besides being more complicated and expensive to make. The only reason for idler drive was to be able to change speeds with a constant speed AC motor. There were no electronic drives/variable speed motors at the time. They persisted in the radio industry because you cannot slip cue a belt drive and there is no deep bass in radio. When direct drive came around the idler drives disappeared from the market until renovating old used tables became a thing and the mythology matured. It is worse than wearing someone else's used underwear. 

@lewm , you do not have corrected subwoofers and your Lenco does rumble more than any other drive type. If you think it sounds good wonderful, spin away. 

@mijostyn 

 idler drives ALWAY rumble more than any other drive type. and if you had corrected subwoofers you would know that. 

That may be true but there are many other aspects that contribute to TT performance. I refurbished a Garrard 301 for a second system - it blew away the Platine Verdier I was using as a second deck. It also blew away an SME 20. Better timing.

As an aside an associate has a Denon RCP53C idler. He is a professional DJ.

The Denon idler blows off the DD Technics he uses - both as a home audio front end and DJ'ing. It's start and stop time is phenomenal - the best I've seen from any deck - and I've seen a lot.

@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.