I can understand how people will say that they don't hear a difference in caps...
but then for someone whose an engineer or "whatever" come in and claim that there is absolutely no difference in capacitors types, materials, or construction methods is just mind boggling.
of course the test they always do is the sine way sweep. hey look the sweep looks similar. or they'll play a single frequency and say hey it all looks the same on the scope.
this of course discounts the blindingly simple and very very basic fact that all parts of the circuit including the components are dependent on frequency, amplitude, and differential response.
but then they'll say but hey that only matters in the gigahertz range all the standard tests show that it doesn't matter at audio frequency...
which is a valid fact except that none of those tests are about components undergoing and passing extremely distorted square wave signals and anyone who says otherwise is a liar.
either that or they are hiding the big book of valve and transistor behaviors under extreme rail to rail conditions. that shit would be golden.
anyhow...capacitors are different. the spec sheets say they are different. they all have different dielectric properties and behaviors.
that's like chapter 1 of my electronics for dummies books in a little side box called "understanding the difference between ideal and real components" literally they spend like a paragraph on that shit because it's so fucking obvious.
Skreddy wrote:You can look at an oscillator sweep of ceramic caps and see the difference from poly film quite plainly--it doesn't even take ears.
This is exactly what I've been asking for in the past. But the answer is always, "You can't measure it with test equipment, but trust me, it's different."
So to hear you say that it's easy to prove is awesome. Can't wait to see the graphs and charts (from whoever would like to set up the tests).
Like Fox Mulder on X-Files, "I want to believe".
the graphs are out there. but you're never going to see one that says here is the difference and this is what you'll here.
that's because the fact that they behave differently is something that isn't debatable.
build a switchmode power supply with nothing but fender blue molded caps if you don't believe it.
at the end of the day it doesn't really matter if some one's ears are able to prove it conclusively, especially over a youtube or internet clip.
the difference does exist and it's measurable.
keep in mind that this doesn't mean that you can just drop in a cap or switch a cap out and expect differences automatically.
that's the difference between replacing parts and designing around parts.