Incl. 19% VAT

Stax SR-009s

Flagship Electrostatic Headphones
0%Financing from just € 218.75 a month, with a 24-month term.
Delivery Time
5-7 business days

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Sound element with new fixed electrodes
If the fixed electrode becomes infinitely thinner, the air resistance will be de- creased and the permeability of sound waves will be improved. On the other hand, thinner electrodes are poor in rigidity and suffer from vibrations of their own and the sound becomes muddy.The SR-009S evolved further the electrode established in the SR-009 as the integration of presenttechnology.
The edges of electrode hole were smoothened through after-etching processing to reduce air resistance, and the permeability of sound has been much more improved. Moreover, gold plating processing with large specific gravity further decreased the electrode vibration. Finally, the sound clarity has been achieved by reducing the resistance of electrode itself.

Tough solid aluminum chassis
It employed secures firmly the sound element, con- tributing to improve the clearness of sound. Furthermore, the case thickness has been reduced to the limit, making the flow of condensation-and-rarefaction air wave from the sound element more smooth.

New designed guard mesh
Intensity has been increased by giving roundness to the "guard mesh” of sound element, which lowered the influence of reflection and improved the resolu- tion of sound.


Daniel Dimitrov

We have a comprehensive selection of Stax devices available for demonstration in our HiFi and headphone studios in Berlin-Kreuzberg. We look forward to your visit!

Frequency response:
Electrostatic capacitance:
Sound pressure sensitivity:
Bias voltage:
Right/left channel indication:
push-pull electrostatic large circular sound element, open-air type enclosure
5 – 42,000Hz
110pF (including cable)
145kΩ (including cable, at 10kHz)
101dB / input 100Vr.m.s. / 1kHz
Golden solid line (left) and dotted line (right) on the cable
Genuine leather (skin touching portion), high-quality artificial leather (surrounding portion)
Silver-coated 6N (99.9999%) OFC parallel 6-strand, low-capacity special wide cable, 2.5m full length
583g (including cable), 441g (without cable)
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