Eminent Technology ET-2 Tonearm Owners

The Lencos plinths empty rooms are not for controlling resonances - they are for ventilation, as the motor, a shaded pole motor, has very low efficiency and consumes *35W*...!

Pegasus, that picture I linked in the previous link is not the motor hole, it is the armboard HOLE :^)

And there are two of these massive armboard holes going through this plinth. They are separate from the large cavity below the motor assembly that you reference. These armboard holes are helping to provide tonearm isolation from those nasty motor wheel - rumblings. See pic 29 on the virtual system for the whole table pic.

those nasty motor wheel - rumblings.

I was actually amazed about how they disappeared behind the not inconsiderable LP pressing and cutting lathe rumble (the latter sometimes audible too), and behind the superb musical information & drive. I expected problems, but...

armboard holes are helping to provide tonearm isolation

I assume Jean Nantais has pretty good reasons and convictions why he does things the way he does.
But - looking at physics - how could these holes provide isolation from either acoustically transferred noise (which, if they'd change at all, would rather increase) or structure borne noise.
Besides: How does it sound?

Besides: How does it sound?

Hi Pegasus

Do you want the description compared to the other turntables ?
or
do you want to know how certain albums, songs, sound, when I am in a certain mood, with a little drink, and with the full moon in play ? :^)

But - looking at physics - how could these holes provide isolation from either acoustically transferred noise (which, if they’d change at all, would rather increase) or structure borne noise.

Let’s forget the massive cavities under the motor and armboards for a moment and concentrate on the build itself - Review the pic I posted. Look at the alternating layering. The design is meant to dampen/absorb resonances. The armboard is connected to the plinth in four spots where the bolts go in. Armboards can be any material - interchangeable- mine came as a hardwood.

Note: Some, build a plinth for an idler one time, and then modify it, or leave it alone. JN has gone through XX maybe XXX ? plinth builds to get to where he is today with his tables. Just saying. He does have passion. An owner of such a table does "not" think about changing any part of it because of the road it took. You would be messing with it. It is, the table, based on his vision.

*************************

Hi Harry - do you think you will be up and running soon ?

Chris

Hi Chris,
I've not been dead in the water.  The existing setup with mag arm was fine on non-think records.  I just didn't have any room to raise VTA any further.  While waiting for Bruce's screws and Frogman's extra armboad I tried Frogman's suggestion of placing washers between the arm board and the metal sub plinth.  In my case I used 1/4 in. tall nylon spacers.  Had to get longer screws to screw the armboad back to the sub plinth but it was an easy fix.  The 1/4 inch was just the right amount of extra height to gain back VTA range.  I've only been listening a short time but my initial impression is positive, however, I think I've lost a little transparency and focus.  Perhaps with the arm board sitting up on the spacers rather than secured tightly to the metal plinth I'm getting a little resonance in the arm board.  Or perhaps it's the nylon and I should have used steel washers as Frogman suggested.  The jury is still out. Want to do some more listening.

Im beginning to believe there is no life outside of the ET arm 🙄

That would be non-thick records.  You know, the ones we used to pay a few bucks for.