Stax SR-009S Electrostatic Headphones

The case thickness has been reduced to the limit, making the flow of condensation-and-rarefaction air wave from the sound element more smooth.

Intensity has been increased by giving roundness to the guard mesh of sound element, which lowered the influence of reflection and improved the resolution of sound.

Specifications:

Type:push-pull electrostatic large circular sound element, open-air type enclosure
Frequency response:5 42,000Hz
Electrostatic capacitance:110pF (including cable)
Impedance:145k (including cable, at 10kHz)
Sound pressure sensitivity:101dB / input 100Vr.m.s. / 1kHz
Bias voltage:DC580V
Right/left channel indication: Golden solid line (left) and dotted line (right) on the cable
Earpad:Genuine leather (skin touching portion), high-quality artificial leather (surrounding portion)
Cable:Silver-coated 6N (99.9999%) OFC parallel 6-strand, low-capacity special wide cable, 2.5m full length
Weight:583g (including cable), 441g (without cable)