buzz/vibration

Numbers
Numbers Posts: 2
edited December 2004 in Troubleshooting
I own a pair of Monitor 7Cs bought way back in 88. At times one of the speakers makes a buzzing/vibrating sound that is more or less continuous for a period of time before cutting out. The sound does not appear to be dependent on the volume. At other times, there does not appear to be any problem at all. Is the midrange blown? Or could it be the subwoofer? How would I know for sure? Is there a test I can perform to determine which of the drivers may be faulty?
Post edited by Numbers on
· Share on FacebookShare on Twitter

Comments

  • AsSiMiLaTeD
    AsSiMiLaTeD Posts: 11,727
    edited December 2004
    Does it sound like it's only happening at certain frequencies?

    To test the midrange, place your fingers equidistant around the driver itself and press in gently and evenly...if you hear a scratching sound, then it's blown...
    · Share on FacebookShare on Twitter
  • Numbers
    Numbers Posts: 2
    edited December 2004
    Done. And it's definitely scratching. I guess I'm off to the service and parts area now. Thanks Polkmaniac.
    · Share on FacebookShare on Twitter
  • AsSiMiLaTeD
    AsSiMiLaTeD Posts: 11,727
    edited December 2004
    Originally posted by Numbers
    Done. And it's definitely scratching. I guess I'm off to the service and parts area now. Thanks Polkmaniac.
    Give Ken S at Polk CS a call and tell him you're a club Polk member, he'll give you a discount...
    · Share on FacebookShare on Twitter