By-pass capacitor question

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When by-passing are there any benefits from using non-polar caps instead of regular polarized.

I am looking at some .47uf/50v black gates.
The pk series @ $.75 vs. the nx-hi-Q @ $1.95.
They are the same size physically and i don't mind spending the extra if there is some benefit to be had...

specifically when bypassing across op/amp power and larger filter caps in a cd/dvd player.
 
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As always you need to take measurements. It's quite possible for a cap that is inductive to become ineffective at some frequencies due to a resonance effect when bypassed by another small one. The same can be said of lead inductance or print inductance/resistance etc.
You have to design for the frequency range you are after targeting, which can be easier said than done sometimes.
 
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