The Audio2000"S AHP501 professional stereo headphones are designed to guarantee high quality sound reproduction for monitoring or entertaining applications, The AHP501 features high-performance 40mm drivers and low mass 25 micron diaphragms for extended frequency responses, A maximized power-handling capability of the AHP501 ensures full and accurate sound with very low distortion, The soft leatherette earpads and the adjustable headband ensure excellent wearing comfort, Equipped with a 3, 5mm stereo plug and a 6, 3mm adapter plug along with a highly conductive oxygen free copper connecting cable, the AHP501 is ideal for all portable systems and any professional sound system, Type: Closed back dynamic stereo headphones, Professional Monitor Headphones, Drive Units: 40mm mylar cone drive units, Impedance: 32 Ohms, Sensitivity: 100dB/mW, Frequency Response: 20 - 20,000 Hz - 70dB, Maximum Continuous Power: 100mW, Cable Length: 8", SKU: AUDIO132