Choosing and replace capacitors for audio amplifier - Electrical Engineering Stack Exchange


i have old audio amplifier (jvc a-gx2b) produces crackling noises on 1 of outputs. so, opened , discovered 2 largest capacitors seem leaking :

enter image description here

enter image description here

can replace capacitor same characteristics (4700uf 50v), or should instead take specific capacitors audio? if yes, ones ?

in addition, have interest replace capacitors of amp (not 2 largest)?

  • 1: wear safety gloves when handling toxic leaky capacitors, remove , clean safely isoprop. , mark note polarity (-)
  • 2 : measure dia , lead pitch dxl [mm] sort parts this
  • 3: audio or better low esr, highest ripple current caps. < 50mohm, > 3aripple
  • 4: better caps run cooler lower esr , rated higher temp. may not fit.
  • 5: japanese caps have better reliability
    • i suggest 1st choice panasonic @ digikey .. cost of shipping may more cost of caps.

as suggested: cap voltage must same or more
- capacitance tolerance doesn't matter, , may larger value.
- large e-caps may replaced @ same time.


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i have old audio amplifier (jvc a-gx2b) produces crackling noises on 1 of outputs. so, opened , discovered 2 largest capacitors seem leaking : can replace capacitor same characteristics (4700uf 50v), or should instead take specific capacitors audio? if yes, ones ? in addition, have interest replace capacitors of amp (not 2 largest)? 1: wear safety gloves when handling toxic leaky capacitors, remove , clean safely isoprop. , mark note polarity (-) 2 : measure dia , lead pitch dxl [mm] sort parts this 3: audio or better low esr, highest ripple current caps. < 50mohm, > 3aripple 4: better caps run cooler lower esr , rated higher temp. may not fit. 5: japanese caps have better reliability i suggest 1st choice panasonic @ digikey .. cost of shipping may more cost of caps. as suggested: cap voltage must same or more - capacitance tolerance doesn't matter, , may larger value. - large e-caps may replaced @ same time.
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