Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

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  • Rangwan
    Member
    • May 2012
    • 14
    • Thailand

    #1

    Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

    I've bought some cheap amp kit with 4.7uF "Elite" capacitor used for input coupling. And what I currently have is 2.2uF "Nichicon muse ES", if I recapped it, what would be happen with the sound characteristic?
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

    Lower capacitance = less bass in general.

    Depends what the input resistance is.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • Rangwan
      Member
      • May 2012
      • 14
      • Thailand

      #3
      Re: Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

      Thx for reply, btw which capacitor affects the sound quality the most (all electrolytic capacitor present is from "Elite")?

      (which one should I had it recapped?)
      Attached Files

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

        You can learn more here:
        http://sound.westhost.com/articles/coupling-caps.htm
        http://www.bext.com/replace.htm
        http://www.tomshardware.com/forum/41...ctrolytic-caps
        By the way, Sawat Dee Kha.
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • mariushm
          Badcaps Legend
          • May 2011
          • 3799

          #5
          Re: Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

          The datasheet for TDA2003 shows a typical application of the chip with a schematic on page 6 which kind of looks like yours:



          On that circuit, they use a 2.2uF capacitor

          Further in the datasheet it says that its purpose is Input DC decoupling and using a lower capacitor may cause noise at switch on or switch off. So I think you will be fine with a 4.7uF capacitor.

          IMHO there's no point to bother with the quality of capacitors, because the audio chip is not capable of some super high quality sound, or quality enough that capacitors would matter.

          After all, it barely does 8 watts of sound at 16v, with a 40Hz-15kHz range, just enough to cover what a MP3 melody has at 112-128kbps.

          Be sure to use a good heatsink with this chip.
          Last edited by mariushm; 05-23-2012, 11:58 AM.

          Comment

          • 999999999
            Badcaps Veteran
            • Sep 2006
            • 774
            • USA

            #6
            Re: Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

            If this is in a sealed or at least hot running enclosure, replacing the 220uF cap C4 might at some point might be helpful, with a major Japanese brand rated for 105C temperature.

            Otherwise I would think about using a 2.2uF film capacitor for the audio input coupling cap C2 and not care much if the low end rolls off a little higher since this is a fairly current limited amp.

            However, this isn't a very valuable amp as mariushm pointed out, it may not be worth the trouble to do more than have it working properly and you can save the more valuable components for use on another amp.

            Comment

            • Koda
              Badcaps Veteran
              • Aug 2011
              • 317
              • Macedonia

              #7
              Re: Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

              Also I have used Elite capacitors before (EB series to be exact) and I'm pretty satisfied with their endurance. First time I used them was on a 7300 GT about year and half ago and it's still running without any signs of failure. Although chinese, Elite capacitors are a lot better then most of the other chinese brands. My LCD monitor asus 19" has Elites and its nearly 5 years old, no problems so far also.
              Guns don't solve problems. I'll take 12

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

                Originally posted by Koda
                Also I have used Elite capacitors before (EB series to be exact) and I'm pretty satisfied with their endurance. First time I used them was on a 7300 GT about year and half ago and it's still running without any signs of failure. Although chinese, Elite capacitors are a lot better then most of the other chinese brands. My LCD monitor asus 19" has Elites and its nearly 5 years old, no problems so far also.
                I hate to break your bubble but Elites are common failures in Dell and HP monitors. You could just be lucky.

                https://www.badcaps.net/forum/attach...0&d=1337492653
                Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                Comment

                • Koda
                  Badcaps Veteran
                  • Aug 2011
                  • 317
                  • Macedonia

                  #9
                  Re: Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

                  Hey, I didn't say they were top of the line capacitors, I'm just saying they are much better then other chinese brands, you know... the ones that are failing within a month.
                  Also since the problem with elites mostly occurs in Dell and HP monitors maybe it is due to poor heat management? We've seen rubycons fail under intense heat. Yeah you guys hate chinese caps but not all of them can be that bad, not excellent but good enough...

                  https://www.badcaps.net/forum/showth...ighlight=elite
                  Last edited by Koda; 05-24-2012, 04:46 AM.
                  Guns don't solve problems. I'll take 12

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK

                    #10
                    Re: Is it okay to recapping the 4.7uF coupling capacitor with 2.2uF?

                    Originally posted by Koda
                    Hey, I didn't say they were top of the line capacitors, I'm just saying they are much better then other chinese brands, you know... the ones that are failing within a month.
                    Also since the problem with elites mostly occurs in Dell and HP monitors maybe it is due to poor heat management? We've seen rubycons fail under intense heat. Yeah you guys hate chinese caps but not all of them can be that bad, not excellent but good enough...

                    https://www.badcaps.net/forum/showth...ighlight=elite
                    Lelon seems okay. Not seen one bulge in a field of failed CapXon and Elite. Lelon is Taiwanese. Wouldn't use them as replacements though.
                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                    Comment

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