Studio Monitor Series Headphones incorporate high-end materials and advanced engineering; critically clean, exceptionally clear sound for professional and high fidelity applications. Reversible earcups enable single-sided monitoring flexibility. 30 mm diameter drive units are larger than many headphones for deeper bass, lower distortion and wider dynamic range; bass response extends down to a low 18 Hz. 500 mW power handling stands up to day-in, day-out use at high output levels. Ferrite magnets allow for high energy and compact size producing ample sound output - 98 dB/mW sensitivity. Oxygen-free copper cord assures maximum conductivity, minimum noise. It conducts electricity better than conventional copper. Supra-aural design rests lightly on the ear and creates a controlled environment for better sound. Driver is positioned the correct distance from the ear canal. Wide, molded headband distributes the headphone's weight over a wide area; reduced pressure means comfortable listening for hours on end.