Cambridge Audio 640P Phono Preamp has Cheap Xunda Caps

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  • Hypnotoad
    New Member
    • Aug 2010
    • 4
    #1

    Cambridge Audio 640P Phono Preamp has Cheap Xunda Caps

    I recently bought a used Cambridge Audio 640P phono preamp.

    I thought it didn't sound right, being overly bright compared to my other phono stages.

    I got it as a project because I have read many threads about improving the sound by upgrading the capacitors.

    I opened it up and all the electrolytic's are labeled Xunda.

    The funny thing is this unit is not very old but there is brown stuff that looks like it either leaked from inside or it could be the outer coating has melted.

    Not a good sign.

    I ordered replacements for the whole thing.

    Nichicon for the power supply and Elna Similic II for the audio sections.

    The Xunda's seem to be cheap chinese rubbish as why would they leak so soon?

    Why would a respected company like Cambridge Audio use such stuff, I know it's cheaper but it can't cost that much more to use decent ones?

    Here is an example, notice the brown stuff next to the cap on the upper right. looks like it did doodoo:



    Also a quick question, where can I get 22pf, 33pf and 47pf film caps? I also want to replace the ceramic bypass caps as well.
    Last edited by Hypnotoad; 08-29-2010, 11:47 AM.
    Tags: None
    • Th3_uN1Qu3
      Believe in
      • Jul 2010
      • 6031
      • Romania
      #2
      Re: Cambridge Audio 640P Phono Preamp has Cheap Xunda Caps

      Originally posted by Hypnotoad
      Why would a respected company like Cambridge Audio use such stuff, I know it's cheaper but it can't cost that much more to use decent ones?
      Cambridge Audio = Creative. Creative is notorious for using ultra cheap caps and 4558 opamps even in their supposed "high-end" stuff, at least since 2000 or so, coz my ole trusty AWE64 ISA still works just fine. There is nothing wrong with using a 4558 in a line output, but using it in a high-gain input stage such as a mike or phono input is just plain wrong. A mike gain stage with a 4558 is only usable for Skype.
      Originally posted by PeteS in CA
      Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
      A working TV? How boring!

        Comment

        • Triodethom
          New Member
          • Feb 2010
          • 3
          #3
          Re: Cambridge Audio 640P Phono Preamp has Cheap Xunda Caps

          Try handmade at
          http://www.hndme.com/productcart/pc/...?idCategory=25 silver mika or search for polystyrene on google

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 31015
              • Albion
              #4
              Re: Cambridge Audio 640P Phono Preamp has Cheap Xunda Caps

              cambridge audio are jokers who pray on peidophiles.

              sorry, i meant AudioPhiles

              they used to advertise oxygen-free mains cable and gold plated mains plugs "for smoother power" - fuckers!

                Comment

                • PCBONEZ
                  Grumpy Old Fart
                  • Aug 2005
                  • 10661
                  • USA
                  #5
                  Re: Cambridge Audio 640P Phono Preamp has Cheap Xunda Caps

                  Originally posted by stj
                  cambridge audio are jokers who pray on peidophiles.

                  sorry, i meant AudioPhiles

                  they used to advertise oxygen-free mains cable and gold plated mains plugs "for smoother power" - fuckers!
                  I thought it was Audiophools here?
                  Mann-Made Global Warming.
                  - We should be more concerned about the Intellectual Climate.
                  -
                  Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
                  - Dr Seuss
                  -
                  You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
                  -

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