John Curl's Blowtorch preamplifier part IV

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I suppose it’s ‘better’ ....like I said imo.

But when presented to test subjects it seems to be their opinion also.....Maybe the levels I test at are higher than most, but most everything when tuned to flat fr @ lp gets unlistenable once you get into the 95+db @ lp.

And I’m with the time domain being much more important, understanding it? well I’m working on it!

Needing a rolled off upper register with a slight bbc dip could be a result of my mid fi gear also?
 
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I cant answere that for you. Listen to new QUADS to help give you the answere.

All these many details and things add up. Iif you did all you could then you have a really exceptional and more accurate system. No one thing matter a lot, except maybe freq response flatness.

THx-RNMarsh
A small step back to our previous discussion.
You know that the wonderful Quads are almost brick wall filtered above 16Khz, don't you..
So I wonder what 24/192 could add to a 16/44.1 recording, because it cannot be reproduced by this LS.

Hans
 
People can have as many opinions as they like, but I’m always amazed how well you have organized acces to your information. 😀

It's a matter of an elephant memory (a figure of speech, elephants don't excel). 45 years later, I can still derive the 5 fundamental semiconductor equations starting from the Boltzmann transport equation, or transform the Schwarzschild metric around a black hole using the ingoing/outgoing Eddington–Finkelstein coordinates and determine the new geodesics around the event horizon, or prove the Bell's theorem, to name a few. Didn't make me a CEO with a golden parachute, tough ****, but it helped me living to my expectations for as long as it's written in my genes :rofl:.

Now, back to audio myths and legends 😀.
 
May I ask for some more details, similar to things like George likes to know: e.g. What does the whole signal path consist of?
You can lead by example by posting the details of your DACs and cables listening comparison setup.

Personal attack, again and again.
Your intolerance is as difficult to understand as the tolerance you benefit from.
Complaints again and again. It's obvious that you don't like this forum. If I don't like a forum, I move on. Give it a try.
 
45 years later, I can still derive the 5 fundamental semiconductor equations starting from the Boltzmann transport equation, or transform the Schwarzschild metric around a black hole using the ingoing/outgoing Eddington–Finkelstein coordinates and determine the new geodesics around the event horizon, or prove the Bell's theorem, to name a few. Didn't make me a CEO with a golden parachute, tough ****, but it helped me living to my expectations for as long as it's written in my genes :rofl:.

One month ago I started to demonstrate the d=a√2 theorem for a square, eventually I gave up 😱

Now, back to audio myths and legends 😀.
Today I remembered of a Rotel amp with the Audiophile word written on the front which exhibited two film caps between the pre and the amp section
Audiophile was written in italics, like the old marantz etc. 🙄
 

You're correct, it wasn't a copy and paste job it was just ....extremely similar.

From your post John Curl's Blowtorch preamplifier part III :

Oohashi reported in Jakob's much beloved 2000 paper the results of experiments that he claimed are proving people can perceive ultrasonic sounds, thus confirming for both audiophiles and sellers of “high definition” products that CD quality audio is crap.

and from the psaudio website:

Tsutomu Oohashi et al reported in 2000 the results of experiments they claimed proves people can perceive ultrasonic content, thus confirming for both audiophiles and sellers of “high definition” products that CD quality audio is inadequate.

Audio Myths | PS Audio
(fourth paragraph, starting at the second line)

The other lines of both paragraphs are quite similar also, the chronological order is exactly the same in both versions, even (one member will be amazed) the "scare quotes" are there at the same place.

It's therefore no surprise that one can find the same wrong conclusion in both versions.....
 
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It's therefore no surprise that one can find the same wrong conclusion in both versions.....

You can contort the truth as much as you want (relying on the fact that nobody has here the time and/or interest to follow, compare, analyze, etc... this subjective **** over the years, perhaps except those with an agenda like yourself), but reality still bites: Oohashi is a flawed study that proves exactly nothing except being a fine example on how to crash a study by wrongly designing the experiment. Happy living in your bubble.
 
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Syno8 is back to typing in asterisks, and back to making up exaggerated and false attacks on other people's character. He apparently also had to get in the word 'anally' since other words referring bodily waste and associated physiology are automatically replaced with asterisks.

What do other members think about that type of behavior, are we all going to start doing too so we can fight back?
 
New Old info for QUAD ESL owners. Their HV supply is not regulated.
The HV supply affect the HF response progressively as the Hv is reduced.

If you use a 'variac' on the ESL power, you can change the HF response by varying the ac line voltage. When I adjust the ac line voltage upward, i get flat response >20Khz. If I adjust the ac line voltage to a lower voltage, the response drops off well before 20KHz.

I doubt if any magazine testing the QUADs checked and adjusted their ac line voltage before running FR tests.


THx-RNMarsh
 
Hi Richard, it seems that many people here have not exposed themselves to serious speaker design, because the questions seem so elementary, even naive. This is not a slight, but it shows that many of you should read up on or experience what you are suspicious about. You know, like cabinet resonance, absolute polarity, and Time-Alignment. You should also be aware of how each crossover slope changes and usually reduces the ability of a loudspeaker to do square waves or some such.
The very best speaker driver that I know, that can reproduce square waves, etc is the Manger. Next best would be the Quad. Most speakers, including the relatively expensive ones now in my living room really do not do too well with square waves. I find this to be a disappointment. The little Sequerra Met7's do very well, and is probably the reason that I like them so much, but their frequency response is all over the map, apparently. So much for needing flat frequency response. '-)
 
JC, you might want to try phase-compensation on your Wilson's.
And while you're at it, you could do FR correction at the listening position as well. It'll be an eye-opening experience.

At least if you're using digital playback from a PC it's not difficult to implement,
AudiVero's Acourate comes to mind, excellent software for little $. There are freeware solutions to this as well, Rephase

I understand for you this might be not so trivial to realize but maybe some friend with compter knowledge and measurement equipment could help out.
 
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