Sony MDR-V150 Black Headphones with Reversible Housing and 30mm Drive Unit 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. Dynamic Type - YES Closed Type - YES Capacity (W) - 0. 5 Driver unit (mm) - 30. 0 Diaphragm - PET Frequency (Hz) - 16 - 22, 000 Sensitivity (dB/mW) - 98. 0 Magnet - Ferrite Impedance (Ohm) - 24. 0 Volume control - NO Foldable - NO Reversible earcups - YES Cord type - OFC double-sided Cord length (m) - 2. 0 Plug - Straight unimatch plug Weight (g) - 120. 0