Your KEF M500 on-ear headphones produces audio from a fine-tuned 1.5 inch neodymium driver built to deliver full range of high definition audio, from 20Hz to 20kHz. To drive home all the intricacies and nuances of your audio, the KEF M500 utilizes copper-clad aluminum wire voice coils and properly mounted apertures in the acoustic chamber to optimize clarity, dynamics and bass performance. Whether they're used as studio headphones or just for everyday listening, the M500 delivers.