"Eeyore" wrote in
message
Jim Lesurf wrote:

So far as I can recall, it isn't 'news' that caps can
have mechanical resonances. The claim that is
interesting is that they are audible. But to decide, I'd
need to know a lot more about how the 'results' were
obtained. For reasons like those others have already
mentioned.

Crappy quality ones (electrolytics at least) can be bad.
I've come across some. Doesn't mean you have to use magic
dust or incantations to fix it though, just buy well-made
quality product.

One of the problems with NP electrolytics used in crossovers is that they
are often not exactly high-tolerance devices (+80, -20% is not uncommon),
and they are not high-stability or long-life devices, either.

Anybody who replaces parts that have fallen to say 10% of name-plate
capacitance, and finds an audible difference is not necessarily having an
imaginary experience, to say the least. I think this happens a lot.

Fortunately from the standpoint of good results, but unfortunately from the
standpoint of technical understanding, the replacement part is often some
kind of high end device that has been advertised to have magical properties.
Attributing the change to some magic dielectric or foil or esoteric means of
construction is of course foolishment. What really happened is that
something that was broken is now repaired, simple as that.