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Thread: Whatever happened to NXT Loudspeakers

  1. #11
    Join Date: Apr 2012

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    A lot of sub-sonic energy in aircraft noise. How big would an NXT panel have to be to cancel that out?

    Or, thinking along those lines, could you have an NXT array sub-woofer? I suspect that would have to be enormous as NXT units have pretty limited amplitude.

  2. #12
    Join Date: Nov 2008

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    Quote Originally Posted by walpurgis View Post
    A lot of sub-sonic energy in aircraft noise. How big would an NXT panel have to be to cancel that out?

    Or, thinking along those lines, could you have an NXT array sub-woofer? I suspect that would have to be enormous as NXT units have pretty limited amplitude.
    There's a REL behind the sofa

    The sub-sonics are unlikely to be much of a problem, as the aircraft will be travelling far faster than the frequencies generated can travel in air.
    Chris



    Common sense isn't anymore!

  3. #13
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    The air outside maybe, but not inside.

  4. #14
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    Quote Originally Posted by walpurgis View Post
    The air outside maybe, but not inside.
    You're looking for problems that don't exist.
    The buffeting noise of air against the canopy is much more of an issue.
    Chris



    Common sense isn't anymore!

  5. #15
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    How the hell anyone expected or got decent sound from a voicecoil driven cardboard panel with no edge suspension is quite beyond my reckoning

    The whole thing would be flexing all over the place, not acting like a piston that we kind of hope a more standard speaker driver would.

    I can't say I'm surprised that they have vanished from the radar screen in all honesty...

    If you think about the way a Magneplanar or Electrostatic works, then I think you should see they are both driven over just about the whole diaphram, so it moves as near as damn it as one!

    Not some bloody cornflakes box with a voicecoil somewhere on one of the panels, what a piss take
    Bests, Mark



    "We must believe in free will. We have no choice" Isaac Bashevis Singer

  6. #16
    Join Date: Apr 2012

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    The whole thing kicked off in the late sixties/early seventies with Poly Planar speakers and of course the original polystyrene diaphragm Yamaha NS series, which at least had a metal chassis, but no edge suspension.

    Here's a page out of my 1971 G.W.Smith catalogue:


  7. #17
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    Quote Originally Posted by Stratmangler View Post
    You're looking for problems that don't exist.
    The buffeting noise of air against the canopy is much more of an issue.
    Which would of course be creating noise inside.

  8. #18
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    Quote Originally Posted by walpurgis View Post
    Which would of course be creating noise inside.
    which is picked up by a microphone and played 180 degrees out of phase, and at the same amplitude....
    Chris



    Common sense isn't anymore!

  9. #19
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    Quote Originally Posted by Stratmangler View Post
    which is picked up by a microphone and played 180 degrees out of phase, and at the same amplitude....
    & as long as the sounds is rhythmic or continuous at the same kind of frequencies, it'll cancel out

    Indeed

    Just don't mention Dr Dre headphones (beat something or other ).
    Bests, Mark



    "We must believe in free will. We have no choice" Isaac Bashevis Singer

  10. #20
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    Quote Originally Posted by Stratmangler View Post
    which is picked up by a microphone and played 180 degrees out of phase, and at the same amplitude....
    I was refering earlier to the VLF content. I don't see NXT units dealing with it.

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