John Curl's Blowtorch preamplifier part IV

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Re-read-you. Who is trying to silence the other? Would you have privileges that I would not have ?
Unlike you, and this aggressive response is an example, I am not trying to impose anything on others.
Repeating this view again and again IS imposing your view on us. Just saying once 'I don't get vinyl' and stopping there is all that was needed. But you didn't. Or had you forgotten you'd already said all that?




Please, try to find better arguments. I have done this (with, of course measuring instruments).
It never ensure any audible improvement at those points. often useless in my book. So what is the need ?
Mark doesn't appear to measure anything. Yet claims 'better'.
 
I'm still watching so don't lie. I said 'mid level dacs in the range of $1,000 to $3,000.'
Mark, very few of us can afford such prices. And we are all here, I think, to try to break this wall of false connection between prices and real value. I am pretty sure that all the reasons of our presence here.
If not, it should be easy to look at the benchmarks and chose the one at the top of the list without any regards of the prices. The funny thing, on my point of view is that will never ensure, out of an intellectual satisfaction, that we will have the best gear for what we like to hear that is different from one guy to another.
 
Value to cost is definitely not related......but some more costly things are worth the $$ if you want the extra performance.

A perfect example of cheap but good was the Adcom 535.....was only like $300 and whooped up on many of the much more expensive amps.

Did Nelson have a hand in the 535?
 
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...not doing a DBT of any kind...

I have done them at times. Not going to go to the trouble with every single change. Prefer to use multiple skilled listeners and multiple listening sessions as a method for double checking listening perceptions when something worth being really sure of comes up. Enough natural blind events happen anyway, not expected at all by the listener.

Jams HPA-1 design was mostly done by listening except a few AP checks at the very end. Nelson Pass tried blind testing Jam, so did Joe who ran Pass Labs on a day to day basis when Jam was hired. Jam always passes those tests better than anyone else, usually perfect scores. Jam normally listens while knowing what he is listening to though. He can do it, you probably can't.
 
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The whole ice skating analogy doesn't hold for me. And as I can't see the heating as a problem wonder what really happened there. It is a loose end.
Bill,
I don’t try to defend the ice skate thesis, but if a similar thing happens between needle and LP it is not because of heat development by friction but because of pressure, just like ice skating.
Every solid becomes eventually fluid under pressure and part of the energy needed for this results in a temp increase.
And there is at least some circumstantial evidence pointing in this direction.
I'd forgotten about that. I really need to get some time to experiment with stuff this year. That needs replicating and I do have destructable copies of the same record to play with.
I’ll show these former results tomorrow.

Hans
 
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