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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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SET Asylum Single Ended Triodes (SETs), the ultimate tube lovers dream. |
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In Reply to: RE: Yeah, I get that- seen it in spades. posted by morricab on October 20, 2021 at 05:43:08:
I have heard ultra high feedback amps (mola mola for example) that still sound relatively dead dynamically. Sure they play loud and clean but not dynamic.
Yes- something is wrong with the distortion signature. Its not enough to simply get the distortion low.
I agree (and quite a lot) with most of what you wrote.
An amp with huge amounts of feedback would also have a very strong and correlated response to the noise floor and this has negative impacts on perception...I can't see how adding even more feedback would magically take you out the other side for this particular problem.
Its not magic... its just when you get to that much feedback (and it has to be that much even at 20KHz) then it gives the amp the ability to clean up the mess that feedback otherwise leaves. It corrects phase and even corrects the harmonic and inharmonic noise floor (which sounds like hiss, but cannot be penetrated by the ear the way regular hiss can) as well as the bifurcated harmonics it otherwise creates. Back when Crowhurst was writing, this kind of feedback wasn't possible- the gain bandwidth product needed simply was decades out of reach.
But even though that's different today, you still have to pay attention to the distortion signature even though the distortion is much lower. Its got to be right or the amp will still get shot down.
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- Yes!! - Ralph 09:05:40 10/20/21 (0)
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