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In Reply to: RE: N core posted by Davey on January 04, 2018 at 09:05:15
I am at a loss as to why you think I don't grasp such a basic concept and it is widely known that you didn't come up with it. Whether it is a worthy goal or not in the abstract is not much in debate...all amps should strive for the max linearity...according to the listeners. This is not as subjective as you think as there have reasonable attempts to correlate listener preference with distortion. It turns out to not be what most meter readers expect. The reason being the typical strategy for lowering distortion seems to introduce other issues, the most obvious being reduction of low order harmonics at the expense of making many more, sonically damaging high order harmonics. In other words the PATH to lower distortion is arguably more important than magnitude of the reduction. The impact is highly non-linear.
Linearity according to the scope is not weighted for the impact of those residual distortions on the listeners. Cheever and Geddes both came up with exponential weighting with increasing harmonic order. Once accounted for there is a big change in ranking for sonic "straight wire".
"all amps should strive for the max linearity...according to the listeners."
That's an interesting statement. I hope you're not speaking for most listeners. :)
I believe many listeners don't give a hoot about linearity, or distortion performance, or any other objective evaluation characteristic of power amplifiers.
I think you are, at least somewhat, in that camp as well, yes?
Your treatise on why nearly all audio amplifiers are incorrectly designed establishes your baseline on this topic. Unless you've pulled back on your premise regarding this???
Dave.
They may not care on a technical level but many of them care about it sounding more realistic. Correlating what they find more realistic with measurements IS interesting or at least should be to every audio designer... not just a demonstration of design complexity chops.
I walk the walk, having only SET at home. Linearity within the SET domain though is of interest to me, which is why I go with amps from Aries Cerat. Ultra stable and quiet power supplies and using the most linear tubes and design techniques.
Yes, unfortunately walking the walk to Aries Cerat land is extremely expensive.
Very interesting power amplifier products nonetheless, but not an example of what the audio industry should be producing nowadays. IMHO.
Dave.
Your last sentence is rather odd. Why would AC gear not be what the audio industry should be producing? Because of what? Heat? Weight? Price? The "industry" should produce the best sounding gear possible, IMO. AC represents one company's vision of what it takes to do that.
Cost, of course.
Dave.
Just the last one .... ? :)
You should request a list of acceptable amplifier designs and forward it to AC... BTW you need to give the name of at least one giant killer Class D , best of the best ...
Regards
Edits: 01/05/18 01/05/18
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