Sennheiser Pro Audio HD 600 Open Back Professional Headphone High Resolution Over Ear Headphones

Features Computer-based transducer optimization minimizes harmonic and intermodulation distortion Exclusive 42 mm driver and 38 mm diaphragm Specialized acoustic silk controls airflow Frequency response: 12 – 40,500 Hz Detachable OFC copper cable Ultralight aluminum voice coils ensure excellent transient response Acoustically transparent open-back earcups Impedance: 300 ohms Total harmonic distortion: 0.1% What's in the box? HD 600 *1 6.3 mm headphone adapter plug *1