LSi25 Hum and low freq rumble

jrfjrf Posts: 1
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: 1,405
    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.
    2 channel
    Speakers: Mission 770 Freedoms
    Integrated amp: Technics SU-v75 and matching tuner
    CDP: Technics SL-PC20
    Cables: Monoprice, Monster, Acoustic Research, and a few generic ones
    TT: Technics SL-3200, direct drive
    Cartridge: Shure M97xE

    Pc gaming setup
    Receiver/amp: Yamaha RX-V665
    Computer: Lenovo g50 (soon to be upgraded to a Dell Precision 690 which is far from stock!!)
    Interconnects: Amazon basics HDMI, Acoustic Research HDMI, Monoprice speaker cables
    Speakers: Boston Acoustics CR75s

    Random equipment on standby:
    Onkyo TX-v940, JBL woofers and tweeters, single Klipsch KG .5, Yamaha guitar amplifier, Peavey Rage 158 guitar amplifier, Kicker comp 12” subwoofer, single Bose 802 series II, a whole bunch of 1”-3” full range drivers, Infinity Crescendo 3007s (on sale), Polk LSi25s
    txcoastal1 wrote: »

    You don't tell her you read the manual, and you tell her you know what the problem is, and you fixed it, because that what men do, fix things
  • KennethSwaugerKennethSwauger Moderator Posts: 6,531
    Hello,
    I would contact Polk at: 1-800-377-7655 select option 1 for assistance.
    "And the house you live in will never fall down
    If you pity the stranger who stands at your gate" G.Lightfoot
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