Lsi25 sub hum

daboyz
daboyz Posts: 5,207
in Speakers
Picked up a pair today at a great price. When I get them home and try set up #1 in the manual, I plug in the speakers and all I get is a loud hum from the subs. I noticed that the jumpers are gone so I used speaker wire to jump them and still have the same problem. My AVR is set to large on the fronts. They are running through my Parasound. Am I missing something?
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Comments

  • daboyz
    daboyz Posts: 5,207
    Almost sounds more like intermittent static
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  • cincycat13
    cincycat13 Posts: 885
    I have one that does that. Polk said I could send it in for service, but I never did as life got busy. Please share if you resolve.
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  • daboyz
    daboyz Posts: 5,207
    I hooked up the woofers straight to the amp with the speaker wire and I got music. Probably the amps.
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  • EndersShadow
    EndersShadow Posts: 17,596
    Doh!
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
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  • txcoastal1
    txcoastal1 Posts: 13,315
    I have replaced both my amps on my 25's...no hum but a funky garbling sound and a funky smell
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
    Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
    Gear on standby: Melody 101 tube pre, 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, Modwright LS100 (voltz), Simaudio 780D DAC

    erat interfectorem cesar et **** dictatorem dicere a
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  • daboyz
    daboyz Posts: 5,207
    txcoastal1 wrote: »
    I have replaced both my amps on my 25's...no hum but a funky garbling sound and a funky smell

    How much were they?
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  • txcoastal1
    txcoastal1 Posts: 13,315
    Around $300ea...I know...ouch
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
    Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
    Gear on standby: Melody 101 tube pre, 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, Modwright LS100 (voltz), Simaudio 780D DAC

    erat interfectorem cesar et **** dictatorem dicere a
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  • daboyz
    daboyz Posts: 5,207
    That ain't quite the word I was thinking. :(
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  • FTGV
    FTGV Posts: 3,649
    Since the hum is present even when using the hi level inputs it could be a filter cap issue.
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  • Speedskater
    Speedskater Posts: 495
    Do you have a battery powered music source that you could try as the input?

    Static electricity is DC based so no AC hum involved.
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  • rooftop59
    rooftop59 Posts: 8,121
    edited December 2015
    what is the crossover frequency for the subs? Could use external amplification and a passive crossover that feeds below 80hz, like an old M&K piece that comes up on ebay over now and then. Combo would be a lot cheaper that $600.

    Or of course just not run the subs and you have LSi9s right?
    Living Room 2.2: Usher BE-718 "tiny dancers"; Dual DIY Dayton audio RSS210HF-4 Subs with Dayton SPA-250 amps; Arcam SA30; Musical Fidelity A308; Sony UBP-x1000es
    Game Room 5.1.4:     Denon AVR-X4200w; Sony UBP-x700; Definitive Technology Power Monitor 900 mains, CLR-3000 center, StudioMonitor 350 surrounds, ProMonitor 800 atmos x4; Sub - Monoprice Monolith 15in THX Ultra
    Bedroom 2.1     Harmon Kardon HK3490; Bluesounds Node N130; Polk RT25i; ACI Titan Subwoofer
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  • EndersShadow
    EndersShadow Posts: 17,596
    Or he coulda just bought my RTA 11TL's instead for less hehehe......
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
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  • daboyz
    daboyz Posts: 5,207
    Polk is saying caps now. Shouldn't be too bad and it'll still be a good deal I got on them.
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  • EndersShadow
    EndersShadow Posts: 17,596
    daboyz wrote: »
    Polk is saying caps now. Shouldn't be too bad and it'll still be a good deal I got on them.

    Cool! Gonna send it in or have it done by someone local?
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
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  • daboyz
    daboyz Posts: 5,207
    Sending them in. Need to prove I fixed them to the dude I bought them from. He's ponying up $50 towards the repair. :)
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  • daboyz
    daboyz Posts: 5,207
    Update. $50 in parts and $90 in labor plus shipping both ways and they're doing just fine. On one it was the phase toggle switch and the other was a voltage rectifier and the output caps.
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  • EndersShadow
    EndersShadow Posts: 17,596
    Cool. Let me know when you want to sell em to me at rock bottom prices lol
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
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  • daboyz
    daboyz Posts: 5,207
    Yeah, I've got a really special price for you.............:)
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  • cincycat13
    cincycat13 Posts: 885
    edited February 2016
    Thanks for sharing the update. Maybe I'll start looking for packing to send mine in. Or just sell them to Ender cheap while it still buzzes.
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  • nguyendot
    nguyendot Posts: 3,594
    Im sending mine in this weekend. This will be fun.
    Main Surround -
    Epson 8350 Projector/ Elite Screens 120" / Pioneer Elite SC-35 / Sunfire Signature / Focal Chorus 716s / Focal Chorus CC / Polk MC80 / Polk PSW150 sub

    Bedroom - Sharp Aquos 70" 650 / Pioneer SC-1222k / Polk RT-55 / Polk CS-250

    Den - Rotel RSP-1068 / Threshold CAS-2 / Boston VR-M60 / BDP-05FD
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  • daboyz
    daboyz Posts: 5,207
    Good luck, guys!
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