I measured several different types of parts, and captured the results (simply by training a camera at the scope). The value of each of the capacitors was constant, 0.1uF. The signal level was held constant at about 70 volts RMS at 600 Hz across the capacitors. (for about 26mA signal current). This is probably more than you would normally expect, and serves to show the results better.
Already said, a lot of people around me can hear differences in tube amps (so, similar conditions) and in guitar tones (obviously low voltage and very very low current)FiveseveN wrote:Yes, yes, but take a close look at the experiment conditions:That's quite a bit more energy than what you'd find in a stompbox, perhaps by two orders of magnitude. Surely nobody denies nonlinearities caused by parasitic properties and idiosyncrasies of the dielectric or construction. But can one hear them? And in what context? And is he really hearing the effects of these nonlinearities or the difference in actual capacitance or the ammount of money they spent or the pretty coloured stripes or whatever some tonesniffer thinks about those particular caps?The signal level was held constant at about 70 volts RMS at 600 Hz across the capacitors. (for about 26mA signal current)
Wasn't this made clear some 50 pages ago?
In my small amps, when i did comparison caps were within 1,5% (already said too) and cheap, no stripes, only military green, aluminum grey, and orange