John Curl's Blowtorch preamplifier part II - Page 2098 - diyAudio
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Old 1st March 2012, 10:57 AM   #20971
SY is offline SY  United States
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I was referring to the praise heaped on an amp with, let's face it, pitiful performance and a stunning price tag, but all sorts of fashion cred. Your 7th harmonic criterion and the amp's actual performance is what led me to that.

Defending it by remarking that it might work better at 100mW is amazing to me.
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Old 1st March 2012, 12:10 PM   #20972
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Default re: Wavac SH-833

Click the image to open in full size.

"a tube-based monoblock power amp that costs $350,000/pair! Hand-built by Japanese boutique maker Wavac Audio Lab"


.
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Old 1st March 2012, 01:05 PM   #20973
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Sy,

Quote:
Originally Posted by SY View Post
So for $350k, we can keep the 7th down at 100mW. Maybe.

And you wonder why my attitude about High End audio is cynical?
Every field has black sheep or simpletons who do not know better.

This is as true for High End audio as it fir example for the field of Plastics Chemistry. There are some very juicy stories of behaviour for which the word unethical is a very mild one indeed.

The problem is when because of some cases a whole field is targeted.

This would be like proclaiming that all companies engaged in plastics chemistry behave unethical and fraudulent, simply because one can bring one or two examples.

So with respect, I recommend to consider the old adage about people, glasshouses and stones.

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Old 1st March 2012, 01:21 PM   #20974
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How dare you, Du Pont de Nemours corp. is in electronics too nowadays.
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Old 1st March 2012, 01:34 PM   #20975
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Quote:
Originally Posted by ThorstenL View Post
Folks,


And here the distortion for a stereotypical Push-Pull Tube Amp:

Click the image to open in full size.
The mains sidebands are worse (possibly) than the Wavac. We talk about power supplies, grounding, etc. a lot, if the effect of these is not taken into account I figure these THD discussions are not very relevant.
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Old 1st March 2012, 01:35 PM   #20976
SY is offline SY  United States
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Quote:
Originally Posted by ThorstenL View Post
Every field has black sheep or simpletons who do not know better.
So are you saying that there's merit in a $350k component with dreadful performance?

I don't follow your plastics chemistry analogy. In that field, data and performance are the drivers. You can't market a $1000/kilo plastic with lousy measured mechanical performance by claiming it made your toothbrush feel better.
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Old 1st March 2012, 01:56 PM   #20977
zinsula is offline zinsula  Switzerland
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Quote:
Originally Posted by SY View Post
[...]And you wonder why my attitude about High End audio is cynical?
I believe Thorsten meant that your attitude toward hig end audio should not be cynical because of a 350k amp which doesn't perform "well" according to a thd measurement (and of course some other examples).
There are quite a lot of "high end" manufacturers which deliver good performance and a fair price, so no reason to be cynical towards "the high end audio" per se......
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Old 1st March 2012, 02:12 PM   #20978
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Originally Posted by zinsula View Post
There are quite a lot of "high end" manufacturers which deliver good performance and a fair price....
Some. Not a lot, IMO, especially the latter.

BTW, it wasn't a THD measurement, it was a full distortion spectrum. And as you alluded to, a horrifically poor and load-dependent frequency response.
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Old 1st March 2012, 02:24 PM   #20979
Bonsai is offline Bonsai  Taiwan
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Clearly the emperor clearly has No clothes.

And people have the cheek to diss opamps.

I am just donning on my flak jacket and combat helmet.
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Old 1st March 2012, 02:50 PM   #20980
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When I once heard the Wavac by randomly visiting other listening rooms at CES, I was very impressed by the sound quality of the system. They were using Tannoy Westminster horn loaded speakers (I'm pretty sure), this big tube amp, and playing a record. It was Ella Fitzgerald singing 'September Song' that knocked me out. It was so realistic.
Much later I looked at the 'measurement' of one of the Wavac amps and was very surprised. It looked almost impossible to achieve such a bad measurement at just one watt output. Perhaps it was just a synergistic combination of the horn speaker and the amp that was the key. Since that ONE TIME, years ago, I have never heard the Wavac sound that good, but then they changed speakers, went digital source, etc. at later shows.
The price is 'obscene', but then just wait for the Japanese price of our new Constellation products to appear in stores. We are just as 'obscene' price-wise. Please remember that the Blowtorch cost 5 million yen, in Japan. That's pretty expensive too!
Now that I think about it, it would seem that the Japanese manufacturer, Wavac, probably could NOT lower its price from the Japanese one, even for sale in the USA, in order to protect its Japanese sales outlets.

Last edited by john curl; 1st March 2012 at 02:57 PM.
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