HD 400 PRO Studio Reference Headphone 3 m coiled cable with 3.5 mm jack plug 3.5 mm jack plug to 6.3 mm adapter 1.8 m straight cable Quick Guide Safety Guide Technical Data Impedance 120 ? Frequency response 6 Hz to 38 kHz (-10 dB) Sound pressure level (SPL) 110 dB (1 kHz / 1 V RMS)
