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  1. #1

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    Default Shielding in LSi15?

    I just got a pair of LSi15s and have them sitting about 3 or 4 feet from my 32" tube TV and have noticed a serious magnetic color bloom. Could the LSis be causing this from that distance? I also have an LSiC right above the TV, but I've had that for months without any problems...
    Thanks-
    Rob
    Yamaha RX-V1500 // Outlaw Audio M200 (x2) Panasonic TH-52PZ700U
    Sony DVP-NS715P // Sony Playstation3 // Roku Soundbridge M1000[/color]
    Polk LSi15 (w/Monster Z2 Wire) // Polk LSiC // Polk LSi7 // Velodyne DLS-3500

    Workshop Rig: Creek 4330 // Technics SL-P310 // Cambridge Soundworks Ensemble 2

  2. #2

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    The woofer is not shielded, so that could explain your problem.
    'Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

  3. #3

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    Default

    I just went to the website and found the following:

    LSi15-
    Subwoofer
    1 - 8" Diameter (20.32cm)
    Polymer composite cone with rubber surround (shielded)

    Midrange
    2 - 5-1/4" Diameter (13.34cm)
    Dynamic Balance with Aerated Polypropelyne cone, rubber surround and cast aluminum basket (shielded)

    Tweeter
    1 - 1" Diameter (2.54cm)
    Dynamic Balance Ring Radiator (shielded)

    But- I think I isolated the problem to a pair of older speakers that I had sitting next to the TV for a while...
    Yamaha RX-V1500 // Outlaw Audio M200 (x2) Panasonic TH-52PZ700U
    Sony DVP-NS715P // Sony Playstation3 // Roku Soundbridge M1000[/color]
    Polk LSi15 (w/Monster Z2 Wire) // Polk LSiC // Polk LSi7 // Velodyne DLS-3500

    Workshop Rig: Creek 4330 // Technics SL-P310 // Cambridge Soundworks Ensemble 2

  4. #4

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    Ah, very good. Looks like I had some bad info.....sorry about that.
    'Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."

  5. #5
    Polk Customer Service
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    Default

    The sub section is shielded, but not as tightly as the top sections are. Unfortunately subwoofers in general are this way due to their much larger motor structures. My LSi25's also did the same thing when I had a direct view TV, the only solution is to move them further away.
    -Eric
    -Polk Audio

  6. #6

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    Thumbs down

    Thanks, Eric- That is a bummer.

    It looks like one speaker is much much worse than the other. Is it possible that the shielding wasn't applied properly? Is there a way to test the shielding?
    Last edited by RobXant; 01-01-2005 at 12:18 AM.
    Yamaha RX-V1500 // Outlaw Audio M200 (x2) Panasonic TH-52PZ700U
    Sony DVP-NS715P // Sony Playstation3 // Roku Soundbridge M1000[/color]
    Polk LSi15 (w/Monster Z2 Wire) // Polk LSiC // Polk LSi7 // Velodyne DLS-3500

    Workshop Rig: Creek 4330 // Technics SL-P310 // Cambridge Soundworks Ensemble 2

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