MDR-7509HD's auranomic, circumaural headphone is the headphone designed for the critical listener seeking the best in high definition sound

With the Sony MDR-7509 Professional Studio Headphones, you'll have high-quality Stereo headphones for critical and demanding professional applications. When you're involved in a long listening session, wearing comfort is extremely important - the MDR-7509HD's auranomic, circumaural headphones fit the bill. They feature 50mm HD Drivers that realize up to 80kHz ultra-wide frequency range reproduction. The MDR-7509HD employs newly-developed The new 360kJ/m3 high power neodymium magnets are used for the driver unit to reproduce clear midrange audio, and the closed circumaural design deliver maximum comfort while eliminating uncomfortable pressure on the ear. If you're working in studio and Broadcast monitoring, or as a studio engineer, DJ, or musicians -- these are the headphones you need. If you're seeking High Definition Sound from a variety of audio sources, the MDR-7509 is the headphone designed for the critical listener seeking the best in sound.

Driver unit: Dome type, 50mm diameter

Frequency response: 5-30kHz

Driver size: 50mm

Neodymium Magnet

Maximum input: 3000mW (IEC)

Impedance: 24 Ohms (at 1kHz)

Sensitivity: 107 dB/mW

Unique folding design with supplied soft case

Gold connectors & OFC(oxygen free copper)* cord with stereo Unimatch plug*

Oxygen Free Copper is used in audio and video cables. Copper is an excellent conductor of electrical current and electronic signals. The presence of Oxygen within the cable can tarnish copper and compromise the integrity of the signal's transmission. By certifying that the copper wire is Oxygen-Free, there is an assurance that conductivity will be clean and clear throughout the life of the product.

Unimatch is a term coined by Sony to indicate a plug that can be adapted to another sized plug. Headphones, for example, may be used with a miniplug (in portable recorders and players) or with a 1/4" phone plug (in home stereo components). It is also used with microphones.

Cord length: 9.8 ft.