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Magnetic shielding?

Discussion in 'Home Cinema Speakers' started by Manuman, Feb 14, 2003.

  1. Manuman

    Manuman
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    I recently acquired a Sony FS76 Tv to replace my aging JVC set, i put my old Jamo Centre 100 centre speaker on top of the FS76 and noticed some staining in the top righth hand corner of the screen. When i took the jamo off the TV, the staining went. So, i checked on the Hardware reviews on here and it says that my centre IS magnetically shielded, so whats going on??

    btw, i know i should reallu upgrade the centre speaker, but am i likely to experience the same probs with a better centre, i.e. i was thinking of a B&W one.
     
  2. James45

    James45
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    your new TV is more sensitive to magnetive fields than the old one try putting the speaker on top of something, the thicker the better, so it is not directly on top of the tv.
     
  3. deckard

    deckard
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    Another thing you might try is to degauss the screen with the speaker in position on top. For most tellys (I think!) this involves switching it off then on again - NOT merely into standby.

    This helped me in the past when an errant magnetic field was causing probs.
     
  4. Reiner

    Reiner
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    your new TV is more sensitive to magnetive fields than the old one

    Or the speaker isn't that well shielded at all. In fact there is no shield as such, just an additional magnet with an opposed (magnetic) field orientation glued to the back of the driver.
    This is more or less effective.
    As advised increasing the distance may help, do not expose the TV permanently to the magnetic field to prevent long term damage.
     
  5. James45

    James45
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    that's true but surely the new tv would have to be more sensitive (or more poorly shielded itself) to show problems where the old one did not.
     
  6. Manuman

    Manuman
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    Thanks guys, i dont have any choice other than to put it on top of the tv, so i guess the only solution (as someone suggested)would be to place something in between the set and the centre speaker?
     
  7. Noodle

    Noodle
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    or you could wrap your TV in tin foil.
     
  8. Steve.EX

    Steve.EX
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    Try : www.cpc.co.uk (page 3 of Loudspeaker Accessories - sorry can't seem to direct link)
    They sell magnetic shielding cans for driver magnets in 2 different sizes (not sure if this is mu-metal)

    Steve
     
  9. jim.rae

    jim.rae
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    The tin foil idea is not as daft as it sounds...

    A couple of my TV stands I got with TVs have foil glued to the underside of the TV shelf - and I have had no purity problems at all...
     

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