Koss QZ900 Noise Cancellation Headphone (Black)

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The QZ900, latest addition to the Koss Quiet Zone line – adds a new level of performance and comfort. Designed to monitor outside noise received through specially mounted microphones in each ear cup. Koss QZ900 circuit introduces a sound wave which is 180° out of phase with the incoming signal. The result is “zero earth” at the point of the eardrum and dramatic reduction of most low frequency distractions, resulting in deep rich lows and sparkling highs, noise canceling ability so good you’ll need less volume for greater efficiency and less distortion from overdriving the tiny amplifier in yo

  • Reduces harmful and annoying low frequency sounds in noisy environments
  • Operates on 1 AAA battery for battery life of 50 hours (Not Included)
  • Cord unplugs to enjoy passive and active noise cancellation wirelessly
  • Folds flat for portability, carrying case included
  • Straight, single entry 4 foot cord with inline volume control
  • Dramatically Reduces Most Low Frequency Distractions From Airplanes, Lawn Mowers, Fans Or Even The Din Of An Office
  • Freq Resp: 20 Hz-20 Khz; Imp: 32_
  • Operates With Or Without Active Noise-Canceling Circuit Engaged

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Koss QZ900 Noise Cancellation Headphone (Black)

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Koss QZ900 Noise Cancellation Headphone (Black)