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Thread: Re-Capping

  1. #1
    Join Date: Sep 2017

    Location: Northampton

    Posts: 177
    I'm Chris.

    Default Re-Capping

    Hi all

    When would you consider re-capping a power amp? Does it start sounding different, less dynamics perhaps? Maybe just after a certain length of time? Just wondering

    Chris

  2. #2
    Join Date: Feb 2013

    Location: W Lothian

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    I'm Grant.

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    Most modern Amps of decent quality should last 20 years if not over used or abused before trouble occurs but that's just an estimate and every one will be different. Only way to be sure is to test the caps
    Regards,
    Grant ....

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  3. #3
    Join Date: Sep 2017

    Location: Northampton

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    I'm Chris.

    Default

    Quote Originally Posted by struth View Post
    Most modern Amps of decent quality should last 20 years if not over used or abused before trouble occurs but that's just an estimate and every one will be different. Only way to be sure is to test the caps
    Do things just sound different?
    Last edited by Lerxst; 30-12-2017 at 22:21. Reason: Wording

  4. #4
    Join Date: Aug 2010

    Location: Torquay, Devon.

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    I'm Shane.

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    If it ain't broke, don't fix it!

    S.

  5. #5
    Join Date: Feb 2013

    Location: W Lothian

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    I'm Grant.

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    Quote Originally Posted by Lerxst View Post
    Do things just sound different?
    often yes.. lose a bit of drive and speed etc.. bass can drop, and its possible for hum to appear. Will often go for 30 years but can be a lot earlier. Different makes of Cap fail worse than others.
    If in doubt, take it to someone for a service.
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D DARBEE - JBE SERIES 3/M55E/EMOTIVA XPS1 - TWIN PRO MONOBLOCK AMPLIFIERS - XIANG SHENG DAC\PRE\HEADPHONE AMP - TWIN AVANTREE OASIS CLASS 1 BLUETOOTHS - AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10 JRIVER23, DEEZER HiFi - ECHO DOT - SMSL M6 MINIDAC - RPI/AUDIOPHONICS - FULL RANGE TWIN TELEFUNKEN/Q ACOUSTIC BT3/CANTON SUB - P.INSPIRED MAINS REGENERATED.

  6. #6
    Join Date: Sep 2017

    Location: Northampton

    Posts: 177
    I'm Chris.

    Default

    Ok, cheers,

    I just wanted to know what the symptoms are really. Not going to interfere until then.

    Thanks
    Last edited by Lerxst; 30-12-2017 at 22:31. Reason: can't spell

  7. #7
    Join Date: Apr 2012

    Location: Southall, West London

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    I'm Geoff.

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    Quote Originally Posted by Lerxst View Post
    I just wanted to know what the symptoms are really
    Loud bang, blinding flash and billowing smoke!



    I guess that's possible , but more likely you'll just hear anomalies in the sound. Electrolytic caps can show their age visually by leaking or swelling.

  8. #8
    Join Date: Aug 2008

    Location: Suffolk, UK

    Posts: 1,055
    I'm Paul.

    Default

    Generally if a powersupply cap goes duff it either explodes, swell or it starts to leak DC current and eventually can cause a fuse to blow. There can be more subtle issues but you need a scope to see what may be going on.
    ~Paul~

  9. #9
    Join Date: Apr 2012

    Location: London

    Posts: 280
    I'm james.

    Default

    PSU caps can cause hum as they age. Coupling caps can fail and shunt large DC voltages into the circuit with sometimes catastrophic results to the amp and/or speakers. Any mid price Eastern amp from the mid nineties to the mid noughties could have faked 'branded' caps installed during manufacture and need a good look at. Before and after this time you should be pretty safe.

    Sent from my GT-I9195 using Tapatalk

  10. #10
    Join Date: May 2012

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    I'm I'mteachingmarcotheartofpishanto.

    Default

    What amp is it and how old ?
    Music , fills the gaps between silence !

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