A little, but honest.
What's really rude is coming into a thread where a guy is asking a simple question and going on your ignorant tirade instead of telling us you can't hear the difference and leaving it at that.
For the record I know recording engineers who are very particular about the capacitors in their gear. When they've used a console for 10+ years and recap it and it sounds wrong... They try again.
Not all capacitor use is of equal importance. My turn: from here your looking like the ignorant mouth piece with nothing worthy ( just another useless opinion) to say. Look up ego, your is too big for the little knowledge you have.
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THE RULES
NOT ALLOWED:
1.Disruptive behavior of any sort, including offensive language, trolling, threadjacking, insults, intimidation, harassment or other disrespectful or antisocial behavior. (Notes 1 & 3)
You dont find any difference either, if you did you could prove it.
Well, pardon me for pointing out the obvious but I DO hear a difference between different types of power supply capacitors in power amps, preamps, mixing desks, mike preamps, valve circuits, etc, etc, despite your certainty that I don't, (?!) so why would I need to prove something that is 'self-evident' - that's nonsense.
Perhaps you achieve some sense of satisfaction to castigate this stupid old "audiophool" for his opinions about capacitor sounds in power supplies - your arrogance is astonishing and -> my 'ignore' list
NOT ALLOWED:
1.Disruptive behavior of any sort, including offensive language, trolling, threadjacking, insults, intimidation, harassment or other disrespectful or antisocial behavior. (Notes 1 & 3)
You dont find any difference either, if you did you could prove it.
Well, pardon me for pointing out the obvious but I DO hear a difference between different types of power supply capacitors in power amps, preamps, mixing desks, mike preamps, valve circuits, etc, etc, despite your certainty that I don't, (?!) so why would I need to prove something that is 'self-evident' - that's nonsense.
Perhaps you achieve some sense of satisfaction to castigate this stupid old "audiophool" for his opinions about capacitor sounds in power supplies - your arrogance is astonishing and -> my 'ignore' list
To get back on topic before this turns into an argument about what's audible or not, what's the amplifier?
Time for my 0.02 Peso. What you need in a PS is a stable output voltage, of your choice, with low noise, low impedance and sufficient current for your circuit. The cost of a capacitor is not directly correlated with that outcome. An amplifier is a DC modulator. High source impedance will increase IM. Some people like distortion. I don't. A 105c cap with a voltage rating higher than the required minimum will last longer. Pick a cap to achieve the above goals and stop arguing.
In a stereo amplifier where one power supply powers both channels, a quick look at the schematic will show if it is a bridging amplifier.
Amplifiers that are not, if you follow the output signal path, you just might find it has the current sourced from the power supply capacitor through the output transistor(s) into the load and then to the circuit common also called ground, where it the is returned to the power supply capacitor.
In simple terms the power supply capacitor is in series with the loudspeaker. So the issue is how much variance in capacitor parameters matters. Most knowledgable folks would consider a difference in the output variance of -30 dB to be perceptable. That would be a .1% difference in circuit impedance. Thus I would look at the apparent impedance between the two at 3,000 hertz to see if the was a difference of 4-8 milliohms. For the less sensitive folks -20 dB it would be 40-80 milliohms.
The open question is how the feedback circuit is configured to see if it is isolated enough from both power supply variations and measurement point voltage drops to see if it is effective in reducing these effects or in some cases it even makes it worse.
That is also why most power supplies in well designed amplifiers have bypass capacitors near the output devices.
The other issue is the self resonant frequency of the capacitors. When you parallel capacitors you want those frequencies far apart and in particular not to reinforce a resonance!
Amplifiers that are not, if you follow the output signal path, you just might find it has the current sourced from the power supply capacitor through the output transistor(s) into the load and then to the circuit common also called ground, where it the is returned to the power supply capacitor.
In simple terms the power supply capacitor is in series with the loudspeaker. So the issue is how much variance in capacitor parameters matters. Most knowledgable folks would consider a difference in the output variance of -30 dB to be perceptable. That would be a .1% difference in circuit impedance. Thus I would look at the apparent impedance between the two at 3,000 hertz to see if the was a difference of 4-8 milliohms. For the less sensitive folks -20 dB it would be 40-80 milliohms.
The open question is how the feedback circuit is configured to see if it is isolated enough from both power supply variations and measurement point voltage drops to see if it is effective in reducing these effects or in some cases it even makes it worse.
That is also why most power supplies in well designed amplifiers have bypass capacitors near the output devices.
The other issue is the self resonant frequency of the capacitors. When you parallel capacitors you want those frequencies far apart and in particular not to reinforce a resonance!
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Time for my 0.02 Peso. What you need in a PS is a stable output voltage, of your choice, with low noise, low impedance and sufficient current for your circuit. The cost of a capacitor is not directly correlated with that outcome. An amplifier is a DC modulator. High source impedance will increase IM. Some people like distortion. I don't. A 105c cap with a voltage rating higher than the required minimum will last longer. Pick a cap to achieve the above goals and stop arguing.
