Why do turntables sound different?


Let's consider higher-end tables that all sound excellent. Same arm/cartridge and the rest of the chain. Turntable is a seemingly simple device but apparently not quite or not at all.
What do members of the 'scientific community' think?
inna
@lewm,

"lubrication is made more effective as well on a smaller tighter tolerance contact also,"

I agree. Just take a look at the newer automobiles with tighter cylinder/piston tolerances that use thinner viscosity oils...
"lubrication is made more effective as well on a smaller tighter tolerance contact also"


^^^ actually, I think I said that , in response to lewm on the first page...

and the tighter tolerances in engines and lighter oils is actually one of the many reasons I feel strongly on this point and why better bearings are both lower in friction and self noise..... These new engines run so smooth now its almost mandatory to have an exhaust specifically built to add a "note" so it sounds masculine...........
I think, most manufacturers have no idea what they are doing and why?
They buy some parts, think they are good because they get praise from people who also have no idea from anything (revievers/customers) ....and the story will go on and on ...
Problem is always those who buy things. If it's not good enough - don't buy it. It's not water or food, you know.
But, some manufacturers are very good, so it's not all bad.
"I think most manufacturers have no idea what they are doing and why? They buy some parts, think they are good enough because they get praise from people who also have no idea from anything"...

@syntax 

Sorry, no offence, but.... IMHO.....
That's the most "over" generalized statement I have read in some time....
It also implies, no one else knows what you do, to be able to criticize "most".
Below is a good part of most, and none, IMO, fall into your shade...
Sure some have other current makes to add as well..........let alone the brands of the past .....
Some not mentioned may well fall into your generalization but the word "most" is a gross over reach.............and price has nothing to do with a statement that uses "most" when it comes to turntables .

Acoustic Signature
AMG
Basis
Brinkman
Continuum
Davinci
Dr. Freickert
Forsell
Grand Prix
JA Michell
JC Verdier
Kuzmo
Kronos
Linn
Oracle
Rocksan
Simon Yorke
SME
Sota
Schick
Tech Das
Transrotor
Technics
TW Acoustics
Walker
Well Tempered
Vyger