LSi25 Hum and low freq rumble

I have a pair of LSi25’s and am having the following issues with the left speaker:
1. Low level Hum, independent of input or connections.
2. Sub woofer intermittent low frequency rumble independent of input or connections.
Does Polk perform repairs or can you recommend a good service? Can I just replace the board? Please advise

Answers

  • mlistens03mlistens03 Posts: 2,449
    jrf wrote: »
    I have a pair of LSi25’s and am having the following issues with the left speaker:
    1. Low level Hum, independent of input or connections.
    2. Sub woofer intermittent low frequency rumble independent of input or connections.
    Does Polk perform repairs or can you recommend a good service? Can I just replace the board? Please advise

    The LSi25s are no longer in production, so you can’t replace the board with a new one. If you have electrical knowledge then I would suggest that you open it up and inspect the board (probably the pre amp section is the culprit). Be sure to take pics while you are in there, because some of us have electrical knowhow (I’m not the best by a long shot) and we may be able to help.
    Micah
    music on vinyl; https://www.discogs.com/user/mlistens03/collection
    Technics SL3200 turntable; Shure M97xE cart; Hagerman Audio Labs Bugle 2; NAD C352 integrated; KEF Q150 speakers; Velodyne VA-907 subwoofer; home-built stands, generic cables but will upgrade soon...

    desktop; Lenovo G50 running Win10, Yamaha RX-v665 AVR, JBL e30 headphones
    I've always thought the goal of high-end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.
  • KennethSwaugerKennethSwauger Moderator Posts: 6,833
    Hello,
    I would contact Polk at: 1-800-377-7655 select option 1 for assistance.
    "They thought we were too loud, but shoot, I had four army blankets folded over my amp, and the volume level was on 2. I'm used to playin' on 10!" S.R.V.
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