The Sanskrit word “Sundara” literally means “Beautiful” and this all new Planar Magnetic headphone fits this description in every way. Ultra-fine Diaphragm All New Planar Headphone Inherited from Hi-Fi man’s Advanced Technology Featuring Newly Developed Diaphragm that is 80% Thinner than the HE400 Series Resulting in a Wider Frequency Response, Faster and More Detailed Hybrid Headband Design With the weight spreading strap for outstanding comfort but with a more fashion conscious look with its sleek and sumptuous matte black finish. Form Follows Function With its all metal headband the SUNDARA is built to take the rigors of urban street life. The SUNDARA is as tough as it is beautiful. New 3. 5mm Headphone connector for enhanced durability Pocket Powered Performance The slim line Supermini is the perfect on the partner for the SUNDARA. The Supermini with its abundance of audio power output and the SUNDARA’s grace and poise makes them the velvet glove over a marble fist. Technical Data Specifications Frequency Response: 6Hz - 75kHz Impedance: 37 ohms Sensitivity: 94dB Weight: 372g