Concerning the pops in the speakers, here's the warning of Ayon, coming from the manual of the CD5s (I have the previous CD5) :
"In all our CD-players the Ayon 6H30 output stage is designed in an extremely puristic and “short” manner, i.e. absolutely zero-feedback, no corrective or compensating elements and no filter in the circuit.
Furthermore in the output stage we use “big volume” coupling capacitors that provide a maximum current transmissibility due to their negligible “capacitor resistance”. Resulting from all these puristic measures a short “tube-ping/pop” may be audible occasionally or always when pressing the “play/start”-button. (initial voltage flows through the wide 6H30 grid – and is being biased). Of course, this effect depends upon the input sensitivity of your power amplifier and/or your speakers respectively. The 6H30 tube is not defective but this is its property in this specific circuitry. We could eliminate this effect with only 2dB negative feedback or using so-called coupling capacitors of “small volume”, but then the sound image would no longer be so “light” and “airy”. This way we provide the best possible sound for our customers."
So it seems the "pops" I was earing were generated by the 6H30, and for a strange reason the input tube on one of my power reproduced it, and not the other. The concerned input tube 6SL7 works perfectly excepted this pops.
Concerning the 4 big "no-name" polypro caps for the power supply I was about to put instead 2 MKP Mundorf 47µF / 400V (same value) + 2 lytics F&T with higher value (100 - 150 µF) +decoupling if enough space. According to what you said, no big benefit to expect ?
"In all our CD-players the Ayon 6H30 output stage is designed in an extremely puristic and “short” manner, i.e. absolutely zero-feedback, no corrective or compensating elements and no filter in the circuit.
Furthermore in the output stage we use “big volume” coupling capacitors that provide a maximum current transmissibility due to their negligible “capacitor resistance”. Resulting from all these puristic measures a short “tube-ping/pop” may be audible occasionally or always when pressing the “play/start”-button. (initial voltage flows through the wide 6H30 grid – and is being biased). Of course, this effect depends upon the input sensitivity of your power amplifier and/or your speakers respectively. The 6H30 tube is not defective but this is its property in this specific circuitry. We could eliminate this effect with only 2dB negative feedback or using so-called coupling capacitors of “small volume”, but then the sound image would no longer be so “light” and “airy”. This way we provide the best possible sound for our customers."
So it seems the "pops" I was earing were generated by the 6H30, and for a strange reason the input tube on one of my power reproduced it, and not the other. The concerned input tube 6SL7 works perfectly excepted this pops.
Concerning the 4 big "no-name" polypro caps for the power supply I was about to put instead 2 MKP Mundorf 47µF / 400V (same value) + 2 lytics F&T with higher value (100 - 150 µF) +decoupling if enough space. According to what you said, no big benefit to expect ?
If those white caps are, as they appear, right after the rectifiers and before the regulators, then, yes, I would not expect to hear much, if any, improvement, but it's not impossible there may be more effect.
Ayon seems to be saying that the 6H30 has a tendency to swing dc voltage through it's grid. Yet another reason I would never, ever use that tube. Really bizarre behaviour.
Ayon seems to be saying that the 6H30 has a tendency to swing dc voltage through it's grid. Yet another reason I would never, ever use that tube. Really bizarre behaviour.
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