LSI15 trouble, please help

dsswonder
dsswonder Posts: 2
edited July 2007 in Speakers
Hello,
I am new to this board...
Could any one know what happen to my LSI15 speakers (used as front); one day out of power in the neighborhood, then I realized it's treble is not working any more "no sound", only sound comes from midrange and woofer.
I had a Denon AVR-4800 hook with the pair. Did re-setting all the options of the Denon, but still no treble sound. Could It be blew...Had them for 4 years and 3 months now (warranty for 5 years).
Appreciated
Post edited by dsswonder on

Comments

  • dkg999
    dkg999 Posts: 5,647
    edited July 2007
    A voltage spike that gets into your speakers will tend to take out either the crossover or the tweeters. Have you checked to make sure the metal jumpers are still in place? If they are not and you have your speaker cables attached to the mid/woof terminals, you would not have any sound from the tweeters. If you have sound from the mid/woof, then it's probably not a receiver problem.
    DKG999
    HT System: LSi9, LSiCx2, LSiFX, LSi7, SVS 20-39 PC+, B&K 507.s2 AVR, B&K Ref 125.2, Tripplite LCR-2400, Cambridge 650BD, Signal Cable PC/SC, BJC IC, Samsung 55" LED

    Music System: Magnepan 1.6QR, SVS SB12+, ARC pre, Parasound HCA1500 vertically bi-amped, Jolida CDP, Pro-Ject RM5.1SE TT, Pro-Ject TubeBox SE phono pre, SBT, PS Audio DLIII DAC
  • F1nut
    F1nut Posts: 50,769
    edited July 2007
    Hello and welcome.

    It would seem as though your tweeters are toast. Contact Polk Customer Service at 1-800-377-7655. They will take very good care of you.

    Is English your first language?
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    President of Club Polk

  • Shannon W.
    Shannon W. Posts: 568
    edited July 2007
    Pull the X-over out and see if it looks like this.

    http://i157.photobucket.com/albums/t52/Imlow78/DSC00732.jpg

    http://i157.photobucket.com/albums/t52/Imlow78/DSC00731.jpg

    http://i157.photobucket.com/albums/t52/Imlow78/DSC00730.jpg

    http://i157.photobucket.com/albums/t52/Imlow78/DSC00729.jpg

    If so, push the resistor back against the circuit board and re-solder it and your fixed. That is what I had to do to my Lsi9's and that fixed them.

    Shannon
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  • reeltrouble1
    reeltrouble1 Posts: 9,312
    edited July 2007
    Or call Polk and let them do what they do as has already been suggested, since they are under warranty I would not go polking any iron in there.

    RT1
  • dsswonder
    dsswonder Posts: 2
    edited July 2007
    dkg999 wrote: »
    A voltage spike that gets into your speakers will tend to take out either the crossover or the tweeters. Have you checked to make sure the metal jumpers are still in place? If they are not and you have your speaker cables attached to the mid/woof terminals, you would not have any sound from the tweeters. If you have sound from the mid/woof, then it's probably not a receiver problem.

    yes, since the first day, I have always had the metal jumpers in place, and the speaker cable is always connected at the bottom 2 terminals. Right now I only can hear the sound from sub-woofer and the midrange.

    Probably something else, I did tried it with my other low end receiver (in other room), stiil a no go. So probably the tweeter toasted, or the cross over itself per someones here post.

    I will try to unscrew the screws in the front of the tweeter tonight when I get home and see, hope I am not doing anything wrong.