STAX, the pioneers of the world's first open electrostatic type headphone combines over 40 years of experience and new technology to create the 4070 earspeaker, the world's first enclosure electrostatic type headphone. The 4070's employ an original "bass-reflex like" ventilation air structure, which results in open-air sound quality while eliminating outside noise, thus making a new type of ear speaker. The high quality sound of electrostatic type music listening can now be obtained even in loud environments. Before, monitoring live recording was difficult. Now, monitoring with the highest form of reproduction is possible without the interference of outside noise. STAX electrostatic headphones use neither magnets nor coils like ordinary (dynamic) headphones, instead, uses an electrostatic field reproduces sound. Two parallel-arranged fixed electrodes, which receives the music signal and super thin diaphragms which receives 580V of dc voltage create an electrostatic field that drives the diaphragm. By this principal, the nature of the sound is detailed, sincere, and a reproduction of all nuances. Type Electrostatic, Close Frequency Range 7~41,000Hz Capacitance 110pF (including cable) Impedance 145KΩ (including cable at 10KHz) Sensitivity 97dB/100V rms Max Sound Pressure Level 118 dB / 400Hz Standard bias voltage 580 VDC Cable 2.5m Wide format, Low Capacitance Weight 625g, 480g without cable Total Weight in Retail box 1.1kg Standard Earpad Sheep Leather, EP-234Limited Compatible Earpads EP-234 series

Made on order. Takes 2 weeks for Stax to make and deliver to us. Japan Made. Highest manufacturing standard Contents Comes in a luxurious Duralumin hard case. Supplied by Authorized Resellers in Japan. Japan Warranty 1 year on labor & parts from the day we sent your parcel. We can help you liaise with the Japan repair centre. You will pay for postages to/from our Japan office, and within Japan. Recommended Driver Units: SRM-007tA Vacuum tube SRM-727A Full range