Koss QZ900 Noise-Canceling Headphones

Model: QZ900 UPC: 021299160077 Item: 165357

Product Information

The QZ/900 is the latest addition to the Koss Quiet Zone line and adds a new level of performance and comfort.The electronics package inside each Koss QZ/900 is designed to monitor outside noise received through specifically mounted microphones in each ear cup. Once this incoming noise can be analyzed, the Koss QZ/900 circuit introduces a sound wave that is 180 degrees out of phase with the incoming signal.The result is what engineer's term "zero earth" at the point of the eardrum. This means that most low frequency distractions from an airplane, lawn mower, fan, or even the din of an office can be dramatically reduced.Once the QZ/900 reduces the outside noise, the Sound of Koss takes center stage. Deep rich lows and sparkling highs in a stereophone you'll want to take along everywhere. In fact the noise cancelling ability is so good in the new QZ/900 that you'll find less need to turn up the volume and overdrive the tiny amplifier in your portable electronics. This means greater efficiency, less distortion and all the excitement of a live performance.The QZ/900 operates with or without its active noise cancelling circuit engaged. A handy removable cord features an in line volume control and one standard AAA battery provides approximately 50 hours of active noise cancellation.Built to last, the QZ/900 is covered under Koss Limited Lifetime Warranty - the only warranty of its kind in the stereophone industry.


QZ900 Active Noise Cancellation Stereophone

  • Frequency Response: 20-20,000 Hz
  • Revolutionary Active Noise Reduction (ANR) stereophone system reduces harmful and
  • annoying low frequency sounds in noisy environments
  • Closed leatherette ear cushion for added passive noise reduction
  • Cord unplugs to enjoy passive and active noise cancellation wirelessly without music
  • Operates on 1 AAA battery for a battery life of 50 hours (not included)
  • Folds flat for portability, carrying case included
  • Straight, single entry 4 foot cord with inline volume control

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