Powerful neodymium magnets for powerful base Closed supraaural design blocks outside noise Individually adustable earcups for a secure fit Optimised for iPod, iPhone, MP3 and CD players. Refurbished to new condition with Sennheiser warranty. The HD 218 is targeted towards cool and trendy young adults, students and professionals who regard Music as part of their lifestyle. They offer a rich Sound stage and stylish design. Sennheiser brings high-quality Audio within reach of the average but discerning music lover. Powerful neodymium magnets produce rhythmic Stereo sound Pillow-soft ear pad design insulates against ambient noise Individually adjustable ear cups for a secure and comfortable fit for all shapes and sizes Single-sided cable prevents tangles Ear cups rotate for flat, compact storage/transport Optimized for iPod, iPhone, MP3 and CD players Connector: 3.5 mm (1/8") straight plug Cable Length: 4.6 feet Ear Cup: supra aural Pads: soft vinyl Frequency Response: 19-21,000 Hz Sensitivity (@ 1k Hz): 108 THD: <0.5% (1 kHz/100 dB) Impedance: 24 Ohm Transducer Principle: Dynamic, closed Sound pressure level (1 kHz, 1 V rms): 108 dB (1 kHz/1 V rms |