Psw505 sub Noise at low frequency or high volume.

My subwoofer makes a noise similar to plywood slapping together very fast, a knocking type noise thats very loud during very low bass or when the volume is higher. I first thought blown driver, but I pressed in on it and didn't hear any noise during the travel. It's been like this for some time so my bandaid has been to turn the volume down on the effected sub. The other 505 doesn't have this problem. Purchased on 11/23/12 so I assume no warranty.
Is there anything I should check? I'm fairly novice. Thanks


  • FestYboyFestYboy Posts: 2,786
    First look for anything near the port that can sympathetically vibrate.

    Pull the driver and inspect for separated driver components. If all is well, manually push/pull the cone through it's full excursion, inspect again.
  • Thanks. Will do and report back this evening.
  • ken brydsonken brydson Posts: 7,149
    edited November 2017
    I believe the driver has a 5 year warranty so if that's the issue you have a few days.
    HT/Main- Panny 50" G10 Plasma, Pioneer SC-1222k AVR, Panny DMP-BD60 BDP, Polk LS90 mains, CS350LS center, LS/fx side surrounds, LS50 surround backs, SVS 25-31PC+ sub, Harmony One

    Office Rig- Marantz 2252B, Denon 2910, Kenwood KD2070 TT, Polk RTA 12B's/ RTA8t
  • 1micdqynps7z.jpg

    Looks like the cone? Has separated from the coil? I guess i'll call support. Thanks guys
  • Just realized they're closed. Hopefully they are open Monday, cutting it close on the warranty. Lol
  • FestYboyFestYboy Posts: 2,786
    The coil tube is still attached to the cone, but the spider has separated, and that allows lateral movement along the pole piece as well as the spider moving out of sync with the rest of the motor assembly... Noise and total failure is inevitable.
  • Called and have one on the way. Thanks again!
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