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drdna wrote:

After seeing the variation in the sound of the TU-X1 to the quality of electricity, and thinking about recent discussions about the Direct Heated Triode, I would like to start a compendium of anecdotal observations of the idiosyncratic nature of component placements in the circuit. If we can make a large group of observations, we would have the potential to analyze the physical properties of the discrete components to uncover what types of noise and signal effects are important. I hope all our members here will contribute some observations.

Hm, I have very many doubts about success of this direction. Surly all passive components in the circuit have influence but I see a desire to catalog and to organize them as some kind of freakish self-serving objective. But is my general attitude toward voicing, if one search the site with word “voicing” then it would be well understood.

I think instead of looking at the generic anecdotal observations that have no references to objectives of observer, to the location of element in circuit and the way HOW this specific element was used it has more since to look at the performance of the very specific elements in context of very specific audio element or circuit. This gives a certain framework and a certain frame of references. I for instance would like to hear what people might say about Sound (or more precisely to say “the sounds” and I feel passive elements operate at First Listening level on my Listening Scale) of a coupling capacitor between first and second stage of Yamamoto’s AD1 amp, or the differences in OPT’s core in some kind of Shindo amp, or sonic differences using a different type of cartridge loading resistor with Aesthetix phonostage, or the need a quality cap between the TU-X1’s detector and decoder.  My interests on all of it are much applied and very specific..

I might be interesting to hear from different people their list of recommended passive elements they prefer to use in different locations, and we have seen it a lot including from me. However, I do not think that it has a lot of practical meaning for others. I would admit that my “list” is not something that strictly my discovery but it was very much influenced by others, still I always question my own observations and conclusions, so how much value would be in the conclusions of others.

As far as “analyze the physical properties of the discrete components to uncover what types …are important”. Well, I do not know. We do not do the discrete components, we use whatever is there. How much values would be if we recognized that tubes with filaments made from thoriated tungsten do not suffers from cathode poisoning? So, what will we do, to covert the oxide cathode to tungsten and to build in our home thoriating bathtubs? I do not think so.

Well, I do not know what I am saying. I need to degree with someone this morning and you were the first one…

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