Stax SR-009S Signature Electrostatic Earspeakers

The Stax SR-009S Signature Electrostatic Earspeakers feature a diaphragm made of ultra-thin super engineering plastic film. The light mass has realised a high transient characteristic throughout the entire audio spectrum. The main body was redesigned to further reduce resonance as to provide a consistent sound.

Multilayer fixed electrode MLER (Multi-Layer-Elect-Rords) established with SR-009 has evolved to MLER 2. The finish and etching process that smooths the edge of the electrode opening reduces air resistance and further improves sound permeability. Also, the electrodes themselves are gold plated with high specific gravity to minimize the resonance of the ultra-thin electrode. At the same time, due to the effect of reducing the electric resistance of the electrode itself by gold plating, we have opened up a new ground for high speed, clarity, silky details, and powerful texture.

Technical Specifications:

Type: push pull electrostatic large circular sound element.
Frequency response: 5-42.000Hz
Electrostatic capacity: 110pF (including cable)
Impedance: 145kΩ (including cable, at 10kHz)
Sound pressure sensitivity: 101 dB / input 100Vr.ms. /1 kHz
Bias voltage: DC580V
Right/left channel indication: Gooden solid line (left) and dotted line (right) on the cable
Earpad: Genuine leather (skin touching portion), high quality Artificial leather (surrounding portion).
Cable: Silver plated 6N (99,9999%) OFC parallel 6-litzig Low capacity special wide cable, 2.5m full length.
Gen. weight: 563g (including cable), 441g (without cable)