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Stax SR‑009D Electrostatic Headphones

£2,799.00

The legendary “009” returns in the SR‑009D Headphones,a refined reissue of Stax’s iconic high‑end model that shaped modern electrostatic headphone design. Featuring the original MLER (Multi‑Layer Electrode) technology, the SR‑009D delivers ultra‑precise, transparent sound with exceptional planarity and low resonance.

Updated with a detachable cable system for greater usability, improved materials, and a refreshed finish, it brings the unmistakable Stax reference sound at a more accessible price point.

Please note: These electrostatic headphones must be paired with an appropriate headphone energizer (Such as the Stax range of energizers). 

Category Open-Back Headphones
Country Japan
Manufacturer Stax

The legendary “009” returns in the SR‑009D Headphones,a refined reissue of Stax’s iconic high‑end model that shaped modern electrostatic headphone design. Featuring the original MLER (Multi‑Layer Electrode) technology, the SR‑009D delivers ultra‑precise, transparent sound with exceptional planarity and low resonance.

Updated with a detachable cable system for greater usability, improved materials, and a refreshed finish, it brings the unmistakable Stax reference sound at a more accessible price point.

Please note: These electrostatic headphones must be paired with an appropriate headphone energizer (Such as the Stax range of energizers). 

Category Open-Back Headphones
Country Japan
Manufacturer Stax

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Book a Demo

  • Type:`
    push-pull electrostatic circular sound element, open-air type enclosure

    Frequency response:
    5 – 42,000Hz

    Electrostatic capacitance:
    110pF (including cable)

    Impedance:
    145kΩ (including cable, at 10kHz)

    Sound pressure sensitivity:
    101dB / input 100Vr.m.s. / 1kHz

    Maximum sound pressure level:
    118dB / 400Hz

    Bias voltage: 580V DC

    Right/left channel indication:
    ‘L’ and ‘R’ indicated on the arc assembly (inside head spring), solid line (left) and dotted line (right) on the cable

    Earpad:
    real leather (skin touching portion), high-quality artificial leather (surrounding portion)

    Cable:
    OFC parallel 6-strand, low-capacity special wide cable, 2.5m full length

    Weight:
    594g (including cable), 452g (without cable)

    • Free Delivery within Mainland UK.

    • 30-Day Money-back Guarantee

    • Returns Policy

Stax SR-009D Electrostatic Headphones

The legendary model “009” is back

The SR-009, the origin of STAX’s current high-end models. Equipped with a large circular sound unit featuring innovative fixed electrodes, this model led the high-end headphone culture for a long time. Production had ceased with the arrival of the new flagship model, but now, in response to numerous requests from fans worldwide, it makes the comeback. With changes to the body color, cable material, and unit case, it is now available at a more accessible price than at its original launch.

MLER (Multi-Layer Electrode)

The SR-009 (released in 2011) was the catalyst for the current high-end models SR-X9000 and SR-009S. The key technology for high-end models, MLER (Multi-Layer Electrode), originated with this model. Using thermal diffusion bonding technology, which unifies photo-etched metal plates at the atomic level under vacuum conditions, this new fixed electrode achieves exceptional planarity, low resonance, and high sound wave transmission. The SR-009D remains the most affordable option for experiencing the sound of current STAX high-end models.

Replaceable Cable Design

SR-009D adopts the replaceable cable structure which is now standard across the current lineup. This enhances usability of the earspeakers by enabling future compatibility with high-quality cables and easy maintenance in case of unexpected cable breakage.