Eminent Technology ET-2 Tonearm Owners

Chris,
This is strange.
For the example BT uses in the manual, pages 48 and 49. The res freq for the ET2 with a 30cu cart we get around 4.7 hz.
For the ET2.5, assuming it is only 9 gms heavier the res freq with the same cart would drop to around 4.2 hz

Perhaps BT could clarify this?

Thanks .

Chris,

04-16-13: Richardkrebs
... Later on in the thread, 03/14/13, Chris published the actual weight of the ET2.5 being only 8gms heavier than the ET2. This means that ET did not use the same cart parameters when giving Chris the original info..

Bruce has confirmed same cart parameters were used.

This is a good example of someone who doesn't have the physics and maths knowledge to apply it correctly. I usually dont bother to check Richardkrebs maths because the underlying assumptions that he uses are usually wrong to start with.

Dover
The arm is a precision instrument and is designed to have split resonances and variable vertical and horizontal mass in order to be tuned. The tuning is critical to optimizing the performance of any cartridge.

Dover – I agree with you and the key for me is “any” No limitation on the cartridge –imo. So far anyway.

imo - Someone just getting into analog with an ET2 doesn’t have this tuning knowledge to start with. It is gear and room specific so takes time to acquire. Looking back now I think I got to about - 6 out of 10 in the beginning; years ago and thought it sounded great. I thought I had it running good – but I didn't understand. The rest comes with experience; Experience comes with time, time in listening to it in your own room and tuning it with your own gear. I believe if had this thread 10 years ago I could have fast-tracked. But then I would have missed out on some fun.

Chris - I agree with your last post and that is why it is vitally important that new owners get correct advice on how to set the arm up correctly.

People very seldom read the manual until something doesn't work as expected - sound familiar.

We should be encouraging ET2 owners to explore the opportunites afforded by the tunability of the ET2.

Setting the levels accurately
Choosing the correct counterweight mass for the cartridge
Dressing the cables
Setting the VTA correctly

When all these are correct the tuning of the I-beam becomes much easier to hear.

We should not be encouraging owners to bastardise the arm by removing its primary design advantages as Richardkrebs continues to do.

Fortunately I have the advantage of importing and selling these arms many years ago and personally set up approx 12-15 ET2's in one year alone. TT's included my Final Audio Parthenon, Sota, Roksan, Townsend ( Rock ), Oracle, Goldmund, VPI and others I've forgotten; cartridges included the usual Koetsu's, Garrotts, Carnegie, Benz, Van den hul's etc
I would never install an ET2 on a suspended TT such as Oracle or Linn because of the shifting mass as the arm tracks across the record. Sota was OK as the suspension is hung and the high mass subchassis is inherently more stable than the Linn/Oracle type TT's.

I disagree with your comment on system dependency. In my experience the sound improvements from the correct set up and application of the ET2, including tuning the I beam/counterweight in it's standard configuration can be heard in any system. That is why Frogman, Slaw, yourself and myself have all come to the same conclusions on tuning the I beam albeit with different systems. What we probably have in common are a good set of ears and an open mind.

Hi Chris,

Regarding the modified ET you posted, I believe it was made by a guy in China. I read an article probably 7-8 years ago, in which he detailed the process of the modification. Unfortunately I couldn't find that article anymore, but it was written in Chinese anyway.

If I remember correctly, he was using it with the Micro 8000 turntable, and the black circular arm base was actually from a Technics 1200!

He sold the ET and Micro later and manufactured his own turntable and air-bearing arm. You can see some photos of them here:

http://www.hdavchina.com/html/72/n-2872-2.html

I am not sure, but I don't think the brand exist anymore.

Hi Thekong – thanks! I like to solve mysteries. They keep nagging at me. Third time is a charm here as they say.

Thanks for the info to that site too with the translator - Obviously someone very passionate about vinyl and the interaction with it.
Cheers Chris

Richard - I don’t pretend to understand the math. I will ask Bruce again when I can for clarification.

Dover - Lets face it – the manual contains great information but is in a really bad need of a re-write with some pretty fonts that audiophiles will actually like to read. A summary two pager to get up and running is also needed to hit the top 10 points.