Sennheiser HD 280 Pro Overview The HD 280 Pro Circumaural Closed-Back Monitor Headphones from Sennheiser feature a collapsible design with swiveling earcups and extended low end reproduction with a frequency response of 8 Hz to 25 kHz. Rejection of outside noise is high, rated up to -32 dB. Efficient neodymium magnets contribute toward an extended dynamic range and high output. The thick, padded leatherette earcups and adjustable padded headband allow for a precise and comfortable fit during extended periods of studio recording and mixing. Closed, dynamic stereo headphones Accurate, linear sound reproduction for critical monitoring applications Optimum impedance ensures universal compatibility Space saving design features collapsible, rotating earcups Up to 32 dB of ambient noise attenuation Neodymium magnets for high maximum SPL Single-sided, coiled cable with 3.5 mm mini jack with locking 1/4" adapter Comfortable for long mix sessions Rugged construction with user-replaceable parts