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John Curl's Blowtorch preamplifier part III
John Curl's Blowtorch preamplifier part III
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Old Today, 09:10 AM   #5961
billshurv is offline billshurv  United Kingdom
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John Curl's Blowtorch preamplifier part III
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Originally Posted by keantoken View Post

I probably missed something, but why don't we find a few grounding diagrams and evaluate them based on these factors, and rate them relative to each other?

.
I think that would be a good idea .I'll try and get a thread started on this over the weekend.
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Old Today, 09:41 AM   #5962
scottjoplin is offline scottjoplin  Wales
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Originally Posted by spaceistheplace View Post
I think itís clear why Stereophile doesnít publish yearly in-depth hearing tests for all their review staff. If you are saying you can hear better than everyone else, why not prove it?
Also, with all the measurement data thrown around here itís pretty strange to see no one has provided any kind of measurement data for their own hearing?
What would that "prove"?
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Old Today, 09:51 AM   #5963
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
How low?

Well from might point of view, and how this all started I was noting that I had no issues with the amplifiers I'm currently boxing up, being basically a composite power opamp has hugely higher loop gain at LF than HF. So 10ppm distortion at 1kHz but only 50ppm at 20kHz. My assertion was that, as no one can hear harmonics of 20kHz is that this is an acceptable compromise.



Now extending it to how much is tolerable at 20kHz is very hard, but as I'm in the 'below 0.1% is good enough for rock and roll' I'm propbably the wrong person to ask.



I should also note that my amplifier choices are driving entirely by space and cost constraints at the moment as I have little of either in my hovel.
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