John Curl's Blowtorch preamplifier part II

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Hi,

With all due respect ,one of the most ridiculous statement i saw in this site,

It is actually a corollary on Sturgeon's Revelation, commonly known as Sturgeon's Law, linked to the fact that with six degrees of separation not everyone knows everyone or even of everybody.

For example, I would be hard pressed to name halve dozen people I know personally and how make great sounding commercial HiFi, I may at best know OF a bakers dozen or two, but I think even that is stretching it. I do know and know of many people that make/design gear that sounds decidedly average or worse.

Of course, I neither know everybody, nor do I know of everybody.

Ciao T
 
Sy,

I.e., 95% of music produced and sold.

It may come as news to you, but 95% of all produced music does not consist solely of e-guitars and e-bass (actually, even the 27% or so labelled as Rock do include other instruments).

In fact, probably halve of that "95%" nowadays do not even use real instruments or musicians at all, the rest varies.

And to consider that everything from Classical over Latin to Jazz and other primarily acoustic genres are only make up 5% of the music sold is a bit wide off the mark (by at least 10dB).

So again you are trying back up a house of cards with more inaccurate claims, inaccurate figures and stuff you just made up on the spot.

Please stop making so many wildly inaccurate claims and please stop to try to back one inaccurate claim by making more such. You can simply admit that you where off base, it happens to all of us.

It is severely unbecoming for anyone wishing to be taken serious to keep acting the way you do.

Ciao T
 
Hi Sy,

I cannot agree. There's plenty of really awful, high distortion, fuzzy, colored tube gear out there. 5% distortion,

Now now, again, extraordinary claims need extraordinary proof.

Please show any tube gear that has 5% THD at all levels (and not only at rated output power limit).

And in fact, please in addition show any piece of solid state gear out there that I cannot get to produce 5% THD if driven hard enough.

Thirdly, as we are asking for proof in extraordinary claims, please show reliable research that illustrates that 5% THD equals sound reliably percieved as "distorted".

And actually, AS WE ARE AT IT, furth please show me a loudspeaker that manages less than 5% THD at full rated power from 20Hz to 20KHz.

No one loves tube circuits more than I,

One would not know from your writings here.

and I would humbly submit that my designs are pretty good,

Hear, hear. You may submit. I personally prefer for other to be judges of my design, instead of telling the world how great a designer I am, but I guess it takes all sorts.

but given the choice between a Dynaco/Marantz/AR phono stage or a well-implemented discrete or IC circuit, I'd take the latter in a heartbeat.

You are welcome to that. I can send you one of my leftovers. They are not very good really, but I suspect they will suffice here.

Please make sure to send me that Marantz 7 preamp in return though. I am unaware of an Tube Gear by AR, all the stuff I am familiar with was solid state, so I guess you need to add them to keeper section, unless you meant ARC, which you also welcome to send to me. You can keep the Dynaco.

Ciao T
 
Hi Sy,

Misquoting is just irresistible to you. I'm sorry, I can't have an honest discussion with people who make up stuff and then attribute it to me.

Forgive me, maybe there are two of you that post different things?

This post is not yours:

http://www.diyaudio.com/forums/analog-line-level/146693-john-curls-blowtorch-preamplifier-part-ii-263.html#post2623116

Is someone impersonating you?

You did not answer:

I.e., 95% of music produced and sold.

to my comment:

I did however take exception to your assertion that (to paraphrase):

"In music production and performance overload is common"

lest such assertion is strictly limited to the narrow range of the genre oft called "contemporary" and even there only in a small subset of instruments.

In this case I humbly apologise and I suggest you really refer this to the moderators, so they can put a stop to such vile abuse of your good name by third parties.

If however you did post the above referenced post, then I leave it to the genteel reader(s) of thishere board to draw their own conclusion if I made any alterations to either the direct quote or misrepresented what that which was written conveyed.

I believe there is no point to continue to debate with someone whose account is either hijacked by a dangerous maniac, suffers from a disorder so he does not remember what ho posts or is simply being untruthful.

I'm washing my hands of this, let the record stand as it does and the readers draw their conclusions.

Ciao T
 
For example, I would be hard pressed to name halve dozen people I know personally and how make great sounding commercial HiFi, I may at best know OF a bakers dozen or two, but I think even that is stretching it.

No need to know them personnaly, one has just too look at the japanese
once powerfull audio industry..
ALL this production was designed by talented engineers whose knowledge
in audio goes far beyond what is demonstrated here , and we can assume
that they were and still are more than a few dozen..



Hello Wahab

This is a very good point you make about their power amplifiers and CD audio quality.

Regards
Arthur

Hi , Arthur

Yet, they will tell you that CD quality sucks....:rolleyes:

regards
W
 
There's enough to go around.

What a cop out!

Face it, Scott, you're just incapable of designing a good condescension.

I can only imagine what the young lurkers here think about being told not to waste their time.

Look at it this way. Once they've slogged through 33,000+ posts (don't forget part 1 of this saga), they won't be young lurkers anymore. :D

se
 
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Bonsai, have you personally tried enough circuit design topology options and components options.

Regards,

PMA, many.

The issue is not what I have tried or have not. The issues about blanket statements concerning what is good and what is not good when there is ample evidence to the contrary.

Example Claim: amplifiers with global feedback do not sound as good as those with no feedback.

Test: if ZGF amps are truly the best, then these amplifiers will consistently receive the top honors in Stereophile ratings ( I select Stereophile because CH is quick to point out he has a product or products in the A+category - ie his reference point, not mine)

Result: actually there is a fair cross section of products in the top rankings of Stereophile with feedback. I am open to correction, but even a Mark Levinson pre-amp using an AD797 got an A or A+ rating. So, it had feedback, and it used an IC.

Conclusion (this is but one example, granted, but there are others): the statement that feedback amplifiers, or op amp based products do not perform as well, or sound as good, as discrete and/ZGF systems is incorrect, or at best, not proven.
 
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Shocking!

I think it was the same one that used (wait for it) . . . solid state switches in the volume control. Even more shocking. An audio travesty.

Which reminded me of Zane Johnson's (Audio Research) claim in an article I read that tubes were demonstrably better than solid state. So I searched on the web and found a site this had circuit diagrams of his stuff and one of the highly acclaimed preamps used a cheap Dallas solid-state volume control (32 step IIRC and about $2 in low volumes) married to a simple tube amplifier stage. Absolutely nothing wrong with that - I thought it,was quite a novel approach. But this while claiming solid state stuff was crap?
 
Charles Hansen lives in MY reality. He has spent years in it, and we are competitors. We seek to know and appreciate whatever sounds good. That means 'anti-promotion' sometimes, because we do NOT design with tubes, we just appreciate them.
When it comes to tubes, I once sat in the living room of Saul Marantz (who was my boss at the time, I was only a lowly VP of Engineering for his company) and heard the BEST Marantz 7C and Marantz 9 combination that I have ever heard, and it was good, very good, especially for its time of conception. It was not 'perfect' but nothing ever is, and it was a 'keeper'. You see, it was OUR reference and what we had to improve on in solid state form. We succeeded, after 100's of thousands of dollars were spent, with a discrete, all jfet design. We even had Baxandall tone controls. Today, it would cost a fortune to build that design.
Even better, however, are OPEN LOOP tube circuits (DUH) and SY actually makes and promotes one, for some reason. Go, SY, go! I bet that your phono stage sounds very, very, good.
 
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