SR-009D

The detachable cable design enhances usability
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.

Newly developed injection-molded unit case for weight reduction

●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.

Specification

●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)