Improved frequency response is 10 39,500 Hertz ( 10 dB)Hand selected matched driver elements; Highly optimized magnet systems for minimum harmonic and inter modulation distortionHigh power neodymium magnets deliver maximum efficiency; 3.5 millimetre jack plug. Frequency response (Headphones):10 41000 HzLightweight aluminum voice coils for very fast transient responseCable length 118 inches