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John Curl's Blowtorch preamplifier part III
John Curl's Blowtorch preamplifier part III
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Old 18th January 2020, 10:30 PM   #35491
scott wurcer is offline scott wurcer  United States
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Originally Posted by Markw4 View Post
Someone will insist my dac must be oscillating, because they just can't believe it could be possible.
Not the point you are doing what folks have been doing for more than 20 years. It's not subtle, it's easy to hear, if only you were here it would be obvious, yadda, yadda. How about, it's very subtle some people can hear it after hours of comparative listening, many people might never hear it under any circumstances. Maybe the hearing and not hearing changes day to day. Maybe the difference does not exist.

Last edited by scott wurcer; 18th January 2020 at 10:37 PM.
 
Old 18th January 2020, 10:35 PM   #35492
syn08 is offline syn08  Canada
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Originally Posted by Tournesol View Post
An epidemic ?
Don't know, you tell me .
 
Old 18th January 2020, 10:44 PM   #35493
syn08 is offline syn08  Canada
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Originally Posted by Ultima Thule View Post
I guess this is the fellow (attached pictures), always found him to be a humble person though, what brand is he working for these days?
Now if somebody could explain what are these "audio professionals" (he's not alone) doing on a DIY Audio forum...

Certainly not an urge to share schematics, principles or other implementation details with the unwashed masses of innocent amateurs. If you follow their postings you'll quickly note that their technical contribution is asymptotically zero, mostly oblique pot stirring comments. Plus I would think that in a competitive business like High End Audio they should be too busy to afford wasting time in debating unverifiable cable listening impressions with the Infidels.
 
Old 18th January 2020, 11:09 PM   #35494
billshurv is offline billshurv  United Kingdom
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John Curl's Blowtorch preamplifier part III
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Originally Posted by hhoyt View Post

The studio firm I work with is an ATC dealer and properly set up SCM 200/300s with subs can play above 100 dB average without any noticeable strain, with peaks above 120 dB. Too loud for me, but clear proof of excellent dynamic headroom, which is the whole point: before mixdown, compression and limiting the dynamic range of individual channels is pretty amazing, and very high headroom is needed to properly set up mics, levels and the rest.

Thank you for reminding us of this Howie. Easy to forget that even recordings that say 'no compression' have probably had some gain riding. I suspect/fear that quite few recordings that people report to sound 'dynamic' are anything but in reality but have the right secret sauce applied in the studio.
 
Old 18th January 2020, 11:11 PM   #35495
indra1 is offline indra1  Indonesia
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Originally Posted by syn08 View Post
Now if somebody could explain what are these "audio professionals" (he's not alone) doing on a DIY Audio forum...

Certainly not an urge to share schematics, principles or other implementation details with the unwashed masses of innocent amateurs. If you follow their postings you'll quickly note that their technical contribution is asymptotically zero, mostly oblique pot stirring comments...
No need for explanation, see JamJar: an HPA-1-inspired power amp thread as an example. I'd say some of them (not all) do support DIY amateurs.
 
Old 18th January 2020, 11:29 PM   #35496
syn08 is offline syn08  Canada
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Originally Posted by indra1 View Post
No need for explanation, see JamJar: an HPA-1-inspired power amp thread as an example. I'd say some of them (not all) do support DIY amateurs.
You can't be serious. Another thread about the Lin topology. Supporting by keeping the morale up with cartoons, perhaps.

And yourself?

Last edited by syn08; 18th January 2020 at 11:35 PM.
 
Old 18th January 2020, 11:33 PM   #35497
Markw4 is offline Markw4  United States
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Originally Posted by scott wurcer View Post
Not the point you are doing what folks have been doing for more than 20 years.
The dispute probably comes down to the fact that humans tend to believe their own senses. Its hard to accept that one's own perception of reality is a construction of the brain and not reality itself. Again, that is for all humans.

If I hear something clearly, then its hard to believe others shouldn't be able to hear it. It exists, so what's wrong with them.

If I don't hear something at all, then its hard to believe there can be anything there to hear. It doesn't exist, so what's wrong with people who think it does.

There is no way to resolve what some humans can hear without multiple well-conducted studies. Even then, history shows that some people will never believe new research if it goes against their strongly held beliefs. History further shows that collecting enough studies can take 20-years, and then beliefs only change on a large scale when a new generation of humans come along and can evaluate the evidence before they have strongly held beliefs about it.

So, its all a big waste of time to argue here.

There is no money for research.

Now, as a practical matter some people know they can hear what other people can hear so there is no argument. About half the people on this forum can hear capacitors and other elements of audio circuits whether they are technical experts about it not. They get along fine with each other.

The other half know they hear what their group hears and there is not argument between them either. Only they don't hear capacitors or cables or whatever. They get along fine with each other.

The first group sees the second group as partially deaf.

The second group see the first group as crazy or lying, or both.

Given that there is no practical way to resolve the difference in perceptions of reality between the groups, most likely we will never fully get along. That said, I personally don't think there is any justification for allowing Evenharmonics to carry on as he does. Same for Syn08 when he decides to get nasty.
 
Old 18th January 2020, 11:39 PM   #35498
syn08 is offline syn08  Canada
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Originally Posted by Markw4 View Post
There is no money for research.

Ever wondered why?

Hint: serious people without any axe to grind concluded a long time ago there's nothing left to research about.
 
Old 18th January 2020, 11:44 PM   #35499
Markw4 is offline Markw4  United States
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You forgot to include: all inventions that can be invented already have been invented, and there is mathematical proof that man can never fly.
 
Old 18th January 2020, 11:47 PM   #35500
billshurv is offline billshurv  United Kingdom
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John Curl's Blowtorch preamplifier part III
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Originally Posted by Markw4 View Post
. About half the people on this forum can hear capacitors and other elements of audio circuits whether they are technical experts about it not. They get along fine with each other.
.

Or they 'think' they can hear capacitors (assuming you don't mean the mechanical buzz of cheap SMT caps that can occur). I have seen them argue amongst each other quite violently. No testing of their abilities to hear things 150dB down has been made. But they can glom for victory so do so with wild abandon.



It's just as easy to say that half the forum are deluded and the other half are trying to help save their wallets from damage. Equal lack of proof for this statement (other than the scary amounts some pay for uncalibrated components for glomming)
 

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