Klipsch 5.1 Hissing/Backround noise

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  • Bulldog
    Member
    • Oct 2009
    • 15
    #1

    Klipsch 5.1 Hissing/Backround noise

    I've got the Klipsch 5.1 ProMedia PC speaker setup. Recently I started hearing hissing/static/ popping/noise coming from all the speakers no matter if its plugged into the soundcard or not. Tried different power cords, different power outlets. Anyone have any ideas? Does it sound chink cap related?
    Sometimes it will go away for a while and they sound awesome, then the static will come back and stay for a while. Power cycling does nothing.
    Tags: None
    • Krankshaft
      Badcaps Legend
      • Jan 2007
      • 2328
      • USA
      #2
      Re: Klipsch 5.1 Hissing/Backround noise

      Check for cracked solder joints on the main pcb first.
      Elements of the past and the future combining to make something not quite as good as either.

        Comment

        • Bulldog
          Member
          • Oct 2009
          • 15
          #3
          Re: Klipsch 5.1 Hissing/Backround noise

          could not see anything cracked or any obvious leaking caps

            Comment

            • Krankshaft
              Badcaps Legend
              • Jan 2007
              • 2328
              • USA
              #4
              Re: Klipsch 5.1 Hissing/Backround noise

              Did you try freeze spray to look for thermal intermittent ICs?
              Elements of the past and the future combining to make something not quite as good as either.

                Comment

                • Bulldog
                  Member
                  • Oct 2009
                  • 15
                  #5
                  Re: Klipsch 5.1 Hissing/Backround noise

                  come again?

                    Comment

                    • weirdlookinguy
                      Badcaps Legend
                      • Sep 2007
                      • 1638
                      #6
                      Re: Klipsch 5.1 Hissing/Backround noise

                      Freezing spray is something you spray on circuit boards. As the name implies, it freezes the particular part of the board you sprayed. If you spray a certain part of the board and the problem goes away temporarily, you know that your failure is due to either a cracked solder joint or a marginal component that isn't doing its job when it heats up.

                        Comment

                        • Bulldog
                          Member
                          • Oct 2009
                          • 15
                          #7
                          Re: Klipsch 5.1 Hissing/Backround noise

                          It'll do it right when you turn it on. But i see what your saying. It could heat up instantly.

                          I think its in the AC to DC allowing AC to leak thru causing noise?

                          Where can I buy this spray?

                            Comment

                            • Krankshaft
                              Badcaps Legend
                              • Jan 2007
                              • 2328
                              • USA
                              #8
                              Re: Klipsch 5.1 Hissing/Backround noise

                              Before that spray any mechanical POTs with Deoxit contact cleaner.

                              Scratching sounds can come from this.
                              Elements of the past and the future combining to make something not quite as good as either.

                                Comment

                                • berniedd
                                  Senior Member
                                  • Mar 2007
                                  • 119
                                  #9
                                  Re: Klipsch 5.1 Hissing/Backround noise

                                  You could also use the eraser tip of a pencil to rock components on the board gently back and forth. You've identified the bad part when motion causes the symptom to appear/disappear.

                                    Comment

                                    • Toasty
                                      Badcaps Legend
                                      • Jul 2007
                                      • 4171
                                      #10
                                      Re: Klipsch 5.1 Hissing/Backround noise

                                      Any word?

                                      veritas odium parit

                                        Comment

                                        • Maxxarcade
                                          Badcaps Veteran
                                          • Jul 2006
                                          • 973
                                          #11
                                          Re: Klipsch 5.1 Hissing/Backround noise

                                          Is this the system that only uses analog inputs for each channel (no digital decoder/SPDIF input)?

                                          I'm wondering if there is a volume control IC that is getting noisy. That would probably be the only thing that is common to all amplifier circuits, since there is no digital processing IC.

                                          Could also be the power supply, though it would probably be constant, and worse when cold if that were the case.

                                            Comment

                                            • techer
                                              New Member
                                              • Nov 2009
                                              • 1
                                              #12
                                              Re: Klipsch 5.1 Hissing/Backround noise

                                              I have seen this before but I think it was the volume control POT. Its a surface mount type and I have not seen around like it for sale so you may have to get the volume control board from klipsch direct.

                                                Comment

                                                • rhomanski
                                                  nowhere man
                                                  • Dec 2009
                                                  • 5157
                                                  • U S of A
                                                  #13
                                                  Re: Klipsch 5.1 Hissing/Backround noise

                                                  On mine it was a transistor going out, inside the sub box. It also has several known problems with heat related failures of other components. Most will mount two fans to protect these components. A google should still bring up the procedures.

                                                  Regards. Ron.
                                                  sigpicThe Sky Is Falling

                                                    Comment

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