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Stax SR-009S Electrostatic Headphones

  • This is the latest flagship from Stax, a further evolution from the SR-009 with new generation (MLER2) electrode membranes.

    First impressions are collected here: https://www.head-fi.org/threads/sta...earspeakers-released-with-impressions.877870/

    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

    Left & Right Identification: "L" and "R" indicated on the arc assembly (inside head spring) Left channel cable is marked with a solid Line. Right channel is marked with a dotted Line.

    Ear Pads: Genuine Lamb Leather (direct skin contact), high-quality synthetic leather (surrounding portion)

    Cable: Silver-coated 6N (99.9999%) OFC parallel 6-strand, low-capacity special wide cable, 2.5m full length

    Weight: 441 g without cable / 583 g with cable


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