Koss QZ/900 Headphones

The QZ/900, the addition of the line and calmly Koss adds a new level of performance and comfort. The electronics inside each package QZ/900 Koss is designed to control noise outside of a microphone in a manner appropriate to each ear cup. After this input can be considered as noise, Koss QZ/900 circuit a sound wave, the 180 degrees out of phase with the input signal. The result is what engineers term "Ground Zero" on the eardrum. Ie, sincess most of the mouth of the diversion of a plane at low frequency, mower, blower, or even the sound of an office can be drastically reduced. Once the QZ/900 reduction of external noise, The sound of Koss has the stage. Bass rich and sparkling high-stereo all want. In fact, the ability to suppress the noise is so good and that QZ/900ROUVER less to increase the volume of eamplificatore piccolo in portable electronic devices. This means indicates more efficiency, and the distortion Leartes the excitement of live performance. The QZ/900 works with or without active noise cancellation circuit. A cable is a practice in line volume control and a standard AAA battery provides approximately 50 hours of active noise-demolition.