Koss QZ900

Cheap Koss QZ900 Noise Cancellation Headphone (Black) QZ900 operates with or without active noise canceling circuit engaged Features a removable cord and an on line volume control and 1 standard AAA battery which provides approximately 50 hours of active noise cancellation. The result is "zero earth" at the point of the eardrum and dramatic reduction of most low Koss QZ900 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 your portable electronics Operates on 1 AAA battery for battery life of 50 hours (Not Included) Cord unplugs to enjoy passive and active noise cancellation wirelessly ... Learn more »

QZ900 Koss Review: I bought the Koss QZ900 headphones, after a lot of research, as a lower cost alternative to the Bose QC-2 headphones. I've had a chance to compare them to both the QC-2 and QC-3. No question, the Bose QC-2 (over the ear) headphones have the edge. However, I did not care for the QC-3 (on the ear) headphones. On a recent trip across the Atlantic, the airline I was on distributed the Bose QC-3 headphones for use during the flight. I tried the Bose QC-3s, ... Read more »

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