Since no-one has claimed that and, on the contrary, have knocked that straw man down again and again, you're on safe ground.
No,
I'm saying the goal should be a perfect transfer Function, not easily obtainable due to the many variables in sonic reproduction, in the end, its a careful artistic balance of the package to please the ears, art meeting science.
This is why there are so many church's, most here would understand that if they built anything for resale, many factors have to be addressed .......
Sorry I should have quoted, I was referring to yldourights' post.
The noise level in this thread has always been quite high, despite our efforts to inject some signal.
Oh dear! Poor THD once again gets mentioned by someone mocking it. Only the most ignorant and naive engineer would believe the "must" in the above sentence, yet it seems that all engineers get tarred with the same brush. Most engineers would say that there is insufficient information in the sentence to tell whether the two amplifiers would sound the same or different, and if different which would sound better. Why can't people address what we say, instead of arguing against what we don't say?yldouright said:
DF96
I am not mocking the measurement but reminding people of its limitation. Okay, so since this is already a resolved issure, what measures do you believe matter most in making the most transparent amplifier? Since there are probably more than one, assign a percentage to their importance. As for tarring all with the same brush, what did you mean by "typical audiophile scorn" in your earlier post? Be more careful with your posts, they may inadvertently end up exposing your prejudice and hypocrisy
I am not mocking the measurement but reminding people of its limitation. Okay, so since this is already a resolved issure, what measures do you believe matter most in making the most transparent amplifier? Since there are probably more than one, assign a percentage to their importance. As for tarring all with the same brush, what did you mean by "typical audiophile scorn" in your earlier post? Be more careful with your posts, they may inadvertently end up exposing your prejudice and hypocrisy
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Does THD change Timbre ? ............. Look ..
I would say if it is >1% yes, if it is < 0.1% probably not.
Right, so, because it's hard to get that last 0.001% of that goal - which we need oscilloscopes to hear - we should just say screw it and rip down the goal posts and start designing amplifiers completely contrary to the way they've been being designed for 104 years?
If there's a zero after the . I usually don't care, I'm going to hook it up to speakers that probably have double digit distortion figures anyway.
Does THD change Timbre ? ............. Look ..
Not at the levels it's present in non-broken amplifiers, no.
We live in the internet age now, if it was, you'd be able to paste over 9000 links to proof / papers / videos of people beating A/B testing.
Incidentally, you used Tu Quoque and ad hominem logical fallacies to attempt to label my quoting of what you said as a strawman.
This is getting more fun by the second.
Oh, the irony!
yldouright
You can't make anyone see what they don't want to see. Once again you've dismissed without a shred of factual information the flaws in your thesis. You have nothing to learn here, why continue to post and read here?
The basic requirement, as I and others have said, is for the output to be no more and no less than merely a bigger version of the input. This can't be achieved perfectly, but it can be achieved sufficiently well for music to be enjoyed.yldouright said:
Issues (as stated in earlier posts by others and myself) are:
- non-linearity - shown by both harmonic and intermodulation - a crude measure is THD, but low levels of higher order products seems to be especially important so various metrics have been proposed although none has acquired universal acceptance
- frequency response
- noise - both constant noise and any modulation noise
- interchannel crosstalk
- power level just below clipping
- stability
- output impedance (both value and linearity)
- input impedance (both value and linearity)
- variation of any parameters with signal envelope
I won't attach percentages, as that is unhelpful. I suspect that different listeners are sensitive to different issues in different amounts, provided that the whole is roughly correct.
I am sure others may wish to add to the list, but I think I have covered most issues.
My point is: No they will not.
Why do you say so?
Please define what measurable or audible (for me both have an intimate relationship) parameter will vary according to what surrounds the amplifier.
If anything , the amp board "naked" on a wooden table may pick up external interference, RF or whatever or even be unstable for lack of shielding ...... I *hope* you are not referring to that
You claim you can pick, by ear (as always, without looking or getting other non auditive cues) which amp is in a steel case, which one in an aluminum one?
Wow, that's a tall order to fulfill.
Not surprised to find such statements here in DIY Audio where some people is known to claim to hear an improvement by replacing an aluminum electrolytic cap cans with wax and wood, basically the same as what you state here.
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