Super-large 88mm diaphragm for extended low frequency output ^^ 2.4 micron driver, optimized for stability and resolution ^^ MrSpeakers signature NiTinol memory metal headband for exceptional comfort, light weight and durability ^^ Detachable custom fabricated silver-plated copper cable that is non-microphonic, round and super-supple, yet low capacitance ^^ Proprietary machined Teflon amplifier plug with machined aluminum housing, gold plated solid copper pins and a machined aluminum headphone connector