Originally Posted by Alex F.
It is an ongoing problem on this website. A discussion is upended with an insult and an attack in an effort to start a fight.
Where were you insulted? Zillch merely pointed out your errors. That's actually the kindest thing he could do to you, instead of cruelly allowing you to labor under your misconceptions.
Well-meaning posters have to deal with it all the time.
A posting with the best of intentions is neither guaranteed to be true nor automatically earned sanctuary from criticism.
Everything has distortion. Some things have more distortion than others. It's meaningless to lump all distortion together as a single number- if you're going to discuss it you'd better be able to describe the spectra at different frequencies, at different levels, at different loads. And then you'd better be able to describe the setup used to measure it.
Subjective anecdotes are *almost* worthless, but especially ones that involve extensive changes to components inside gear. Your auditory memory lasts only seconds, how long did it take to upgrade the gear? Did you change it back again, so you could compare back and forth? Did you *measure* with anything besides ears?
To be fair, electrolytic capacitors fall very far from the ideal model. But everybody and their dog knows this, and they are used accordingly. Perhaps the caps in your gear were defective, damaged, or poorly implemented in the design. That's not a valid reason to denigrate all designs that use them.
Coupling capacitors are very useful for blocking DC. If a preamp produces (or from a source perpetuates) significant DC, a downstream power amp that also passes DC will amplify it and destroy most speakers in less than a second. That's a pretty good reason for blocking caps and DC protection circuits.