Koss QZPRO Headphones

Koss QZ Pro Noise Canceling Headphones

Part#: 176851 Specs: Frequency response: 40-20,000 Hz Impedance: 32 ohms Sensitivity: 90 dB SPL/1mW Battery time: Approx. 30 hours of continuous play using batteries. The headphones will work without batteries, but not feature noise canceling. Features: Sound: Noise canceling technology Sound: Employs both passive and active noise reduction (ANR) technology Structure: Fully collapsible Structure: Extra-soft, padded headband Contents: Headphones with soft vinyl closed ear cushions Straight, single entry 4 foot cord Warranty: Limited Lifetime Warranty Overall: Packing the one-two punch of passive and active noise reduction (ANR), the Koss Quiet Zone QZ PRO headphones are the noise cancelling headphones of choice for music lovers. Their comfort and collapsibility ? not to mention sound quality ? make them a favorite among travelers. For passive noise reduction, the QZPRO feature soft vinyl, closed cushions, which create a tight seal around the ear and reduce ambient noise, all while retaining bass frequencies. Active noise cancellation circuitry ? embedded into each QZPRO ear cup ? uses tiny microphones that sample surrounding noise and transmit that information to a processing circuit, which then generates "anti-waves" to counteract the unwanted noise and create a peaceful listening environment. No need for noise cancellation? No problem. Turn it off with the flick of a switch. Not only do the Koss QZPRO excel at noise cancellation and reduction, they deliver uncannily high quality sound. The dynamic element bears a full frequency response of 40-20,000 Hz, allowing these noise canceling headphones to boast deep bass and balanced midrange.