John Curl's Blowtorch preamplifier part II - Page 3572 - diyAudio
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Old 22nd February 2013, 04:42 PM   #35711
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WOW! Insulted again! '-)
Here I go out of my way to be objective, fair, and give experience, and still I am attacked.
I did learn something this week that I consider important.
I think that I mentioned that I found a new rock station that sounded great with my old Sony Walkman and headphones. Unfortunately, I found that on my big system, my computer system, or even my car radio, it was pretty darn marginal. I still love the music, but hi fi is not what these stations are broadcasting (most of the rock stations), and it actually sounds better without any highs or even high fidelity playback.
No wonder, Esperado, you show a distaste for really hi fi reproduction. I bet that your horn midrange limits the highs as well. What about it?
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Old 22nd February 2013, 05:01 PM   #35712
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Originally Posted by john curl View Post
No wonder, Esperado, you show a distaste for really hi fi reproduction. I bet that your horn midrange limits the highs as well. What about it?
My system is fine, thank-you. and i would not exchange-it for your Wilson monsters for an empire.
Considering your age, and what i suppose your ear's ability to listen to treble, let-me smile. And if i mistake about this, please, offer your body to the science !

And about hi-fi and engineering,, you are just like those people which advice people with a cancer to stop the chemotherapy and cure themselves with plants. It is simply unworthy.
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Old 22nd February 2013, 05:04 PM   #35713
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For you technically inclined: Most people realize that almost all fuses are non-linear. The distortion producing behavior of fuses is secondary to the strict requirements they most conform to, so I suspect that most typical fuses are made of some sort of alloy that may even be more nonlinear that a what simple metal would be, because this would make fuses more 'ideal' for typical operation.
What do we know about fuses over long term experience? Well, many amps or loudspeakers used to have a fuse, in order to offer protection for the speaker, but sometimes, even the amp. This added nonlinearity to the audio signal, BUT it is difficult to easily measure the magnitude of the nonlinearity, because as the fuse material averages its resistance fairly well, unless you are testing with music or speech, the continuous tone will settle to an average and not show much. We have known this for over 40 years. We also found that, IF we could use a Slow Blow fuse, we would have more overall linearity in this application.
Today we rarely use speaker fuses, but we still use fuses in the power supply rails and ALWAYS in front of a transformer (unless the transformer is internally fused).
Our experience with this is that IF we can replace fuses with circuit breakers, either thermal or magnetic, we get better overall performance. My best amp designs use circuit breakers, but where we can't, we have recommended premium fuses to serious audiophiles for use in the JC-1 power amp, with some success.
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Old 22nd February 2013, 05:21 PM   #35714
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Wilson WATT's monsters? Maybe pip-squeaks! '-)
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Old 22nd February 2013, 05:40 PM   #35715
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Quote:
Originally Posted by john curl View Post
For you technically inclined: Most people realize that almost all fuses are non-linear. The distortion producing behavior of fuses is secondary to the strict requirements they most conform to, so I suspect that most typical fuses are made of some sort of alloy that may even be more nonlinear that a what simple metal would be, because this would make fuses more 'ideal' for typical operation.
What do we know about fuses over long term experience? Well, many amps or loudspeakers used to have a fuse, in order to offer protection for the speaker, but sometimes, even the amp. This added nonlinearity to the audio signal, BUT it is difficult to easily measure the magnitude of the nonlinearity, because as the fuse material averages its resistance fairly well, unless you are testing with music or speech, the continuous tone will settle to an average and not show much. We have known this for over 40 years. We also found that, IF we could use a Slow Blow fuse, we would have more overall linearity in this application.
Then quit making excuses and test with music.

Audio DiffMaker

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Old 22nd February 2013, 05:41 PM   #35716
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Let's also up up the differences between the speaker system that I use today, and the one that Esperado uses today. Both can be very good.
I use 'essentially' a 3 way direct radiator (WATT with sub-woofer) with a very well constructed loudspeaker cabinet, better than 99% of them out there.
Esperado is using a midrange horn, with a direct radiator woofer (I presume). Now, does he add a tweeter, or not? This is an important question, because all the midrange horns that I know of, sharply roll off within the upper band of the audio bandwidth.
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Old 22nd February 2013, 05:43 PM   #35717
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Good idea, SE. Go for it.
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Old 22nd February 2013, 05:54 PM   #35718
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-- Excuse me Scott !

Thx-RNMarsh
Sorry, didn't think we had any art dealers here. The art world does put fashion audio to shame.
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Old 22nd February 2013, 06:02 PM   #35719
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Quote:
Originally Posted by john curl View Post
For you technically inclined: Most people realize that almost all fuses are non-linear. .

Yes but not their selling point...

"Synergistic Research Quantum Fuses employ a custom alloy treated with 2,000,000 volts of electricity! SR Quantum Fuses significantly outperform all other high-end fuses on the market and are guaranteed to deliver a noticeable increase in sound staging, resolution and air thanks to a lower noise floor and blacker backgrounds."

How do you treat an alloy to 2M volts?
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Old 22nd February 2013, 06:04 PM   #35720
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Good idea, SE. Go for it.
I'm not the one doing all the hand-waving and making all the claims. That's you, John.

But apparently it's much easier to just weasel out and continue the hand-waving instead of actually doing something.

As my grandfather used to say, "I see a lot of choppin' but no chips flyin'."

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