Pheonix Engineering Road Runner

Melm,

No actually not - any mat will change the sound of a turntable setup, and I prefer the sound a copper mat produce.  Im thinking about haven one made of Stainless Steel just to try that.

Now lets talk about motors on the DD tables I am talking about, I restore Denon DP3000/2000/6000/7000/80 and DN308.  The motors on these are substantially larger than any of the motors typically used on any belt drive http://www.hurst-motors.com/aabdirectdrive.html this link takes you to the first choice of belt drive manufactures.

The first 4 on my list use almost identical motors, the 80 is even larger, and the DN308 motor is the size of a gallon paint can.   https://pbnaudio.com/pbn-dp8/ - here you can see the motors on the first 4 and the DP80 which is 5.5" in diameter so you have come comparison.  https://pbnaudio.com/pbn-dn308/  This link shows you the motor on the DN 308 - the Bezel that holds the platter and motor is 15.375" just to give you some comparison.


Good Listening

Peter

pbnaudio

I don’t hear the "servo hunting" your describing rather I hear ...

The "servo hunting" common to many DD turntables isn’t detectable as speed variations, ime, but as a veil to the sound.

Before I went to belt drive, I had a Denon DP-6000 and then a DP-80. I can’t imagine ever returning to DD.

Cleeds,  

Different strokes for different folks - I could not imagine to return to belt drive :-)

Good Listening

Peter

@pbnaudio

You wrote: "The motors on these are substantially larger than any of the motors typically used on any belt drive http://www.hurst-motors.com/aabdirectdrive.html this link takes you to the first choice of belt drive manufactures."  

I'm surprised to read that you said that.  The physics of belt drives, with the motor revolving much faster than the platter, permits very small (and very quiet) motors to turn a 30+ pound platter.  In fact, the Hurst motors are among the larger motors used for belt drives.  Excellent sounding belt-drive TTs have been built with clock motors.  The original Sondek motor, for ex., was a tiny one.

As long as you're dragging this out, you wrote earlier: "The reason to put the Tachometers in the turntables to display their accuracy. If you got it flaunt it. :-)"  Are you for real?  You're selling a tach to DD TT owners that does exactly what their TT already does.  So you want them to invite their friends in to watch the tach?  Really??

Nor can I (imagine a return to BD).
Nor do I hear any “veil” coloration or “hunting”, once the plinth is made proper for the device. This is with serviced and calibrated DD tables at quality level DP80 and up. (SP10 Mk3, Kenwood L07D, Victor TT101.)

If you pick up a DD at a garage sale or from your uncle’s closet in unknown condition don’t assume that because it “works” you are getting its best performance. And then don’t think you know how they “all” sound, please.