Koss QZPRO Consumer Headphones

The Koss Quiet Zone QZ Pro headphones deliver a winning combination of passive and active noise reduction for music lovers who are looking for a little peace and quiet on the go. Designed with soft, vinyl closed cushions that create a seal around the ear, the QZ Pro creates a passive, mechanical seal that reduces ambient noise while retaining bass frequencies. Koss' active noise reduction circuitry is built directly into the ear cups using tiny microphones that sense surrounding low frequency. Information about the undesirable sound waves is processed through the circuitry and creates an "anti-wave." The sound wave and "anti-wave" counteract each other at the wearer's ear, reducing the irritating low frequency noise and increasing listening pleasure. Designed to reduce low frequency, repetitive noise, the QZ Pro is most effective at blocking out noises you want to eliminate while not affecting things you want to hear, like voice and music. The QZ Pro affects those noises between 30Hz and 1400Hz, allowing music