Designed to deliver extraordinary sound quality to satisfy the most discriminating listeners, the ATH-AD900x is ideal for music lovers who prefer the spacious quality of open-back headphones that combine involving sound with long-wearing comfort. The ATH-AD900x features large 53 mm drivers exclusively designed for the headphones, with rare-earth magnets and Audio-Technica's copper-clad aluminum-wire (CCAW) voice coil technology for superior audio reproduction with an extremely wide 5 Hz - 35,000 Hz frequency response. The ATH-AD900x offers an immersive listening experience with clear, natural vocal and instrumental reproduction, a smooth tonal balance, precise imaging and superlative dynamic range. The headphones offer a uniquely comfortable fit thanks to their generously cushioned ear pads, lightweight honeycomb aluminum casing and exclusive 3D Wing Support Housing, which adjusts itself perfectly to each wearer. Product Details: Audiophile-quality open-air headphones deliver clear, natural vocal and instrumental reproduction, a smooth tonal balance, precise imaging and superlative dynamic range Large-aperture 53 mm drivers and CCAW voice coils for superior sound reproduction No sense of pressure on the ears, resulting in a completely natural sensation 3D Wing Support Housing offers a vibration-proof mechanism that provides comfortable support for a better listening experience Extremely comfortable ear-fitting pads Gold-plated stereo 1/8 (3.5 mm) connector with 1/4 (6.3 mm) adapter Product Specifications: Type - Open-air DynamicDriver Diameter - 53 mmFrequency Response - 5 - 35,000 HzMaximum Input Power - 1,000 mWSensitivity - 100 dB/mWImpedance - 38 ohmsWeight - 265 gCable - 3.0 m (9.8')Connector - 3.5 mm(1/8) mini stereo, gold-platedAccessory Included - Detachable 1/4 (6.3 mm) adapter WARRANTIES U.S. Two-Year Limited End-User Warranty