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MUSICAL MILLENNIUM. If a technology is not suitable for music, you should not adopt it even if it is a high-tech. Every technology should contribute to music reproduction. The SR-009 is the product of the repeated research trip to technology and material search without deviating from our stance to return to live sound and music always with refined sensitivity. PRIDE AND JOY It will exactly be as a result of "work" each predecessor piled up, if a race, a company, and an individual have "pride". And it clearly depends on the way of life we live now to inherit it and to bear "enhancement" and "evolution." Simply this is proven by the fact that the state-of-the-art technologies in the world exist intensively in present-day Japan . Making valuable new things full of creativity by skillfully taking advantage of these technologies has given birth to a "millennium" earspeaker (electrostatic headphone). SR-009 SPECIFICATIONS: Type :Push-Pull Open Back Circular Electrostatic Headphone Frequency Response :5 - 42,000Hz Electrostatic Capacitance :110pF (including cable) Impedance :145k Ω (including cable, at 10kHz) Sound Pressure Sensitivity :101dB / 100V r.m.s. 1 kHz Maximum Sound Pressure :118dB / 400Hz Bias Voltage :580V DC