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Value of replacing (recapping) all the capacitors in a audio amp.

post #1 of 4
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Had some time while eating my lunch slowly so I googled around concerning something I noticed people speaking about but did not really understand. The activity was replacing capacitors (even if still good) in audio amps (vintage in particular) with higher quality non electrolytic capacitors. It seems that cap replacing has a long history in improving on an existing home audio amps performance. I did not quite understand why so many do not like having electrolytic caps in the audio signal path but the one article stressed how they are something to avoid and replace with another type if possible. Any comments on recapping audio amps? Let me see if I can find the story and present a link.
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post #2 of 4
There are many types of capacitors, each have their up and down sides Electrolytics are pretty decent for audio applications, but not the best in all applications. Hence why people often say "If you can get away with it do not use electrolytics.

Another note and the main reason why people recommend to recap electrolytics is that electrolytics last for only 15 years. They dry out and stop working properly. This is why you should always replace vintage electronics's electrolytics, especially vintage ones.
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post #3 of 4

Typically when I re-cap anything, I try to replace all components with the same, or equivalent parts.  As ThijsH said, a big downside to electrolytic caps are that they dry out, or can explode and cause a decent amount of crud to spew everywhere and they don't age the best around high heat.  If a circuit was designed for them and the only reason the device isn't working is because of age, I just replace components with the same ones and invest in a new power supply for it if it uses an external power supply.

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CHILZ - Lan Rig
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CANARY - Main Rig
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post #4 of 4
Probably all you ever wanted to know about recapping:

AudioGon: Search for “recapping”
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