What happens if it can't be met? Audibly perfect end interfaces are still beyond the limits of technology; microphones and loudspeakers. Is a perfect audio chain the ideal transmission medium between imperfect transducers? It's certainly the most conceptually straightforward.
Can't argue with that. 🙂
But as distortion can come in various flavors, do we need to think about which are audible and which are objectionable or not? That touches on the original question, doesn't it?
Thank you guys for insightful posts. I understand there is not much scientific study for my original question #1, other than missing fundamental phenomenan etc.. After all, it's probably nothing but a subjective or aesthetic preference as usual, I guess, and that is why I love this endless journey. 🙂
Happy holidays,
Happy holidays,
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Thank you for trolling. Is there a scientific study of taste of poop in water, why people prefer it over pee in water? 😀
You just did not get it at all. Your question was wrong from the beginning. Nothing is good in THD, nor any other distortions. There is no preferred curve of THD on different frequencies. It just happens because components have inertia, so curves show how bad is an amp on extreme frequencies, that's it. The less they are bent up, the better. Ideally there should be a straight line under the noise floor. Unfortunately, noise is also an evil that can not be avoided... And so on... Design of an audio equipment means search for an optimum, to make the sound as real as possible. Nothing is perfect, so playing with different components and topologies we try to find an optimal result.
You should ask instead, why people publish THD per frequency plots, what do they want to show, instead of jumping to the wrong conclusion that some forms of curves are desirable, and asking for scientific proof of this nonsense.
Ah, I see. I should have said logical explanation of those 2 different graphs, instead of scientific explanation. 🙂 And I now know there is no logical explanation that all of the people here would agree.
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Logical explanation of what? "Why people prefer a garbage, and which garbage is desired", or "How the garbage happens, and how to avoid it"? You see, there are 2 different questions, where the first one contains a wrong presupposition.
Asking questions with presupposition is either a hidden hypnotic suggestion, or a trolling to steer a discussion.
I guess you call the second amp garbage, and if it's so, yes, my question was exactly it is, "Why people prefer a garbage", and you can translate my original question that way.
BTW, it seems like you think I'm trolling, but I'm not. I'm building an amp based on the circuit on this forum, but many people preferred non-flat THD version than flat THD version, so I just wanted to know why, and that would help me to decide which version I should build first.
Go to Pass forum and search L'amp thread. Michael made a few different versions of this single ended VFET amps, but a few experienced people commented that they prefer the sound of non flat versions (inductor based) over flat version (resistor or active CCS). it would not only because of the THD flatness, but the only difference I can see from my Spice model and the published spec between them is THD flatness.
The reason why I asked this question on the tube forum is, I guessed this kind of preference would have been already well known common sense in the SET tube world. I have almost zero knowledge about tube amp, and my SS amp knowledge is very limited, so if my question made some people here feel bad, I think I would have to apologize my ignorance.
The reason why I asked this question on the tube forum is, I guessed this kind of preference would have been already well known common sense in the SET tube world. I have almost zero knowledge about tube amp, and my SS amp knowledge is very limited, so if my question made some people here feel bad, I think I would have to apologize my ignorance.
You definitely misunderstood something. I may prefer some woman who can't cook a borsh to another that can't bake potato, but not because of borsh or potato. For some different reasons, sometimes I don't know why. 🙂
Right. It is there to show that despite of big non-linear capacitances of MOSFETs the result is not so bad.