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Passive Noise Reduction Full Size Headphones
Like the QZ99, the Koss QZ5 Passive Noise Reduction headphones were initially designed for racing radio scanner and metal detector users, with its superior isolating capabilities and unique behind-the-head headband design. It has since become a favorite for audiophiles who crave the ability to cut out high levels of ambient noise without the constraint of a conventional headband. The QZ5's are not only for noise isolation, but also have superior sound quality.