Which capacitor can be parallel (shunt) on an amplifier's speaker terminals and not cause harmful effects?
A). A polypropylene 0.01uf with 100 volt rating
B). A polyester 0.01uf with 100 volt rating
Which amplifier? That is kinda important.
Either an approximate average or a specific scenerio can make an answer that I'd like to see.
If the answer is application specific, I'd like to see specifics about real amplifiers that are currently in service.
Photographs of actual conditions. . . ah, now that would be excellent!!!
Even a guess at the answer is fine. This is just a survey.
OK, then I can't figure out what you're after. The question makes no sense to me without some context.
Just a guess :D
.01uf in parallel may act as a low pass for speaker, all high frequencies above some point will pass through capacitor.
i have done that in past but with 2200uf and the result was, capacitor absorbs high frequencies and bass was clear.
It may be a little dangerous because high frequencies are getting short for amplifier.
but i think frequency corresponding to .01uf will be very high and it should not damage a 10-25 watt amplifier.
Note : Just a Guess :D
That was interesting!
Here's your Sonic T-amp's speaker-terminal capacitor.
Its better quality than we thought. Note the decimal place activated on the meter. 3.5
A quote from Texas Instruments Filter Pro
The TI Filter Pro design software has this to say about capacitors.
Measures for capacitors:
It takes those three measures (at least) to employ a capacitor reliably.
For example, if an audiophile marketed capacitor and an economy capacitor match on all three measurements, then they will sound the same (not including bypass divisionals, component interreactions, and operating temperature).
ESR, and capacitor types, from lowest to highest:
(per same voltage rating)
Ceramic (lowest ESR)
Polyester (highest ESR)
Lowest ESR types will almost-exactly match design software, however they are costly. Manufacturing specs, unless otherwise mentioned, are calibrated to least-cost components. See the conflict?
The T-amp cap appears to have a P.E.T-Mylar blend, scoring 3.5. That looks like a weird choice.
On the post above that is a polyester 50v cap, scoring 22; however, if that were a 100v version, you may expect from ESR 10 to 15.
For a polypropylene cap, you should expect ESR1 or less (best quality goes less ESR--much less).
If it is a greater figure than 1, then its either defective or an economy version; however, smaller physical sizes have higher ESR as a consequence of their size (usually indicates a lower voltage rating than advertised).
ESR is resistance during an AC signal, such as audio.
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