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    random stuff:
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    Headphones

    Koss Portapro
    koss 
protapro
    open
    impedance: 60 ohms
    sensitivity: 101 dB
    freq response: 15-25,000 Hz
    Audio Technica A500
    audio technica a500
    closed
    impedance: 64 ohms
    sensitivity: 100 dB
    freq response: 5-30,000 Hz
    some good websites:
  • head-fi.org
  • headroom (headphone.com)
  • audiocubes

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