Eminent Technology ET-2 Tonearm Owners

....I tend to post 'in pieces'.

Just wanted to mention that the two lps I recommended earlier, even though they are or the 'digital age', in my view, are again examples of recordings done "right" as opposed to "The Nightfly". I can listen to them and enjoy completely.

In closing.... it seems unless there is some sort of 'reference' established regarding differences in what we're hearing, the whole process is for not. That's kind of what turned me off with regards to comparing the Acutex in our differing systems.

Ketchup, thanks for sharing the data. The question then becomes: how do the different flow rates affect the sound when PSI remains the same? Did you notice differences in the sound with different pumps with the regulator allowing the same PSI? Of course, flow rate would not be the only variable. While I don't have any data on this, I am very aware of the beneficial effects of using a surge tank to smooth out the pulses of air; which, presumably, have different characteristics from pump to pump. What were your findings re the sound when using the compressor and higher PSI (and smooth, pulse-less air stream)?

BTW, I have the lighter magnesium wand which may partly account for the positive results that I have gotten with the Acutex 420. I plan on trying the aluminum wand and will report back.

Ketchup – that is interesting data on the pumps. Thanks for sharing. When my ET2 and 2.5 were next to one another in the same room I noticed when unplugging one for the other how the pressure changed on the dial of the regulator. If I remember right the pressure on the dial would go up with the ET2 and down on the ET2.5 showing that the ET2.5 inhales more air with the larger manifold. So I had to adjust the regulator up or down to compensate.

Here is a pic of the heavy magnesium arm wand

I am curious how many prototypes it took Bruce to come up with that length and size of step up.

Here is some more information for you guys regarding the

I Beam compliance

I asked Bruce another question in regards to the I Beam. Single, double, triple.

If I add one or two leaf springs the I beam becomes stiffer - less compliant.
I have 3 of these ready to swap in - single, double, triple I Beams.

I asked him in his opinion, if a stiffer (lower compliance) I Beam would work better with a lower compliance cartridge, and the opposite true for a higher compliance cartridge? Does it not make sense to match up one end (cartridge side) up with the other side (counter weight I Beam) ?

Just as a guideline - I realize all our setups are different and we need to experiment on our own.

This was Bruce’s response.

Chris,

With respect to the i-beams, this is correct: a stiffer (lower compliance) I Beam works better with a lower compliance cartridge.

Hope this helps – brucet

My ET 2.5 runs a low compliance MC I have been using a double leaf. I am going to try the triple on it. I find the Acutex 420 works well with a single and double. With the triple it still works but what can happen is if the record is not ideal (flat) the sound can get – I am not good with words – too aggressive to me. Lets put it this way – if you are a driving a truck with a leaf spring suspension on the back. What happens when you add or take away leaf springs to the suspension. Now take that truck down a rough road (representing by the lp). Are you going to want fewer or more leaf springs for a smoother ride. The Ibeam is like the leaf spring but working in a horizontal instead of vertical way.

Can anyone tell me what other tonearm out there - regardless of design - allows one to tailor the tonearm compliance to that of any cartridge you are using like this one. Does another tonearm exist like this ?

Slaw – I think you should open up a record store. Make it an internet store with an open chat line to help audiophiles. You would probably make a lot of vinyl people happy picking out good sounding albums for them. But make sure you are your own boss, and don’t have a boss, because he would be upset with why he couldn’t get rid of his Nightfly copies; and other LP’s that don’t meet up to your standards. Just joking of course…not

Thanks for the lp recommendations – will search through my lp’s to see if I can find any of them. For someone that has worked in the IT field all his career - my lp cataloguing system really sucks. Its based on my subliminal - I think. I just find what I need.

it seems unless there is some sort of 'reference' established regarding differences in what we're hearing, the whole process is for not.

Well to me references are like opinions – everyone has one. If you asked 10 audiophiles what their reference(opinon) was for something you would get 18 responses. I have heard this many times on public chat forums like this. Just My Opinion of course.