humming subwoofer

EadionEadion Posts: 5
edited February 2002 in Technical/Setup
A friend of mine owns a PSW250 sub., he bought it as a shelf model from circuit city about 2 months ago. He's been trying to figure out why it hums constantly? and is that normal? It's connected to an onkyo amp. and 5 polk satellites, He claims that everything is connected correctly. Can anyone help...?? Thanks.
Post edited by Eadion on

Comments

  • sgtgtosgtgto Posts: 310
    edited February 2002
    Hi:

    Disconnect all signal inputs to the sub. If the hum goes away either the connection is wrong or the receiver has a problem. If it is still there try a different ac outlet. If that stops the hum you will need to get a power conditioner or use a different ac outlet. If none of the above cures the problem you have a problem with the sub.


    Gary
  • 20hz20hz Posts: 643
    does it have a 3 wire wall plug ?
    if so try a ground adapter plug ( the one with the green wire hanging off) this will allow the ground wire to not be attached .
    Ground hum is a major problem in pro sound amps they even have a ground lift switch to "open ground"
  • txcoastal1txcoastal1 Posts: 9,518
    20hz wrote: »
    does it have a 3 wire wall plug ?
    if so try a ground adapter plug ( the one with the green wire hanging off) this will allow the ground wire to not be attached .
    Ground hum is a major problem in pro sound amps they even have a ground lift switch to "open ground"

    @20hz
    Necro-thread--2002
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures, Simaudio 780D DAC
    Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
    Gear on standby: Melody 101 tube pre, Modwright LS100, Unison Research Simply Italy Integrated
    Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers
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