Sony MDR-F1

Full-Open Design for outstanding stereo soundstage; the drive units sit back from your ears, external to your head, for a more spacious sound, greater listening comfort
Acoustic Bass Lens works with a new diaphragm structure to deliver incredibly deep bass, comparable to closed headphones
Impedance Compensator -unlike other full-open headphones, the MDR-F1 requires no amplifier impedance matching; built-in equalization circuitry eliminates the variations in sound quality caused by amplifier impedance differences
Oversized 50 MM Diameter Drive Units are larger than most headphones for noticeably deeper bass, lower distortion and wider dynamic range; frequency response extends down to an amazingly low 10 Hz
Neodymium Magnets for maximum energy and minimum size; provide increased sensitivity and ultra-high definition sound reproduction
Die-Cast Magnesium Alloy Frame and Super Duralumin Headband for the full-open design combines light weight with extreme resistance to flexing and resonance
Leatherette Head and Earpad "Ecsaine" head and earpad material are durable, yet luxurious to the touch.
Double Headband distributes weight evenly to remain comfortable, even after you've listened for hours on end
Sony UniMatch® plug with fixed mini plug for portable use and screw-up phone plug for home use
Gold-Plated Plugs resist corrosion for high conductivity, low noise
Type: Full-open, Dynamic
Drive Unit: 50mm
Diaphragm: PET
Magnet: Neodymium
Impedance: 12 ohms
Sensitivity: 100 dB
Power Handling Capacity: 700 mW
Frequency Response: 10-30,000 Hz
Headband: Double
Cord: Single-sided, 11 feet (3.5m)
Plug: Gold-plated stereo mini plug; UniMatch adapter with screw-type gold-plated stereo phone plug