Problem with my ASW750

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  • ac81017
    Senior Member
    • Aug 2006
    • 175

    #1

    Problem with my ASW750

    When I power my sub, i can hear and feel noise from the sub, I disconected it from my system moved it to another plugged it in and got the same result?? I plays very well, so there nothing wrong in that area! The driver is moving around 5mm at around 18Hz!! Help!! :M
  • Aldo
    Senior Member
    • Sep 2005
    • 448

    #2
    I think it has something to do with your AC.
    Could you plug it in another room with a different circuit?
    I had a similar problem and it was a bad grounding installation!

    Comment

    • dknightd
      Senior Member
      • Mar 2006
      • 620

      #3
      Are you sure it is 18hz, not 50 (or 60 depending on what they use in Sweden)?

      Obviously it should not do this when just plugged in, with no signal.
      If you short out the + and - of the input does it stop? If so there might be
      some low frequency electrical noise getting picked up by the input. If not I'd
      suspect a problem with the on board amp. Go to your dealer, does their sub do the same thing? If not, take your sub in and see if yours does it there. Could
      be a local problem, could be an equipment problem. Determin that first, just changing outlets in your house is not enough to eliminate a potential local problem.

      Comment

      • ac81017
        Senior Member
        • Aug 2006
        • 175

        #4
        Originally posted by Aldo
        I think it has something to do with your AC.
        Could you plug it in another room with a different circuit?
        I had a similar problem and it was a bad grounding installation!

        Yes, that is possible now that you mention it!! And I also believe that there is bad ground installation! It plays like a dream, I´ll take it to my inlaws and see what happend! :T

        Comment

        • ac81017
          Senior Member
          • Aug 2006
          • 175

          #5
          Originally posted by dknightd
          Are you sure it is 18hz, not 50 (or 60 depending on what they use in Sweden)?

          Obviously it should not do this when just plugged in, with no signal.
          If you short out the + and - of the input does it stop? If so there might be
          some low frequency electrical noise getting picked up by the input. If not I'd
          suspect a problem with the on board amp. Go to your dealer, does their sub do the same thing? If not, take your sub in and see if yours does it there. Could
          be a local problem, could be an equipment problem. Determin that first, just changing outlets in your house is not enough to eliminate a potential local problem.
          I have perfect pitch, and it´s not something I can here as a tone just a rumble down in low HZ! I tried with out signal and in another room, still the same!! :T

          Comment

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