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    Harmonic Overtones over 20kHz and speakers

    Just curious on Frequency ranges of speakers (and electronics I guess) as to whether Harmonic Overtones that are over 20kHz effect sound in the normal hearing range? Has any test been done to verify definitively or is it opinion. In some respects I think it would, how much so I don't know. Just...
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    Sinad noticeable Distraction

    I've been hanging out on the fringes for a while now... one a very tight budget. I've been reading the Topping reviews, their testing and pricing, is interesting to me. Just wondering what everyone's thoughts are when a Sinad score becomes low enough that it starts noticeably interfering...
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    Bang & Olufsen Beoplay A9 Speaker

    I happened across this speaker while looking around the internet... Vary unusual, thought it might be interesting thing to test... Has 7 speakers and 7 individual amps for them inside a round disc on a Tripod.... Bang & Olufsen Beoplay A9 Speaker Over $3000 though
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