STAX SR-009S

Flagship Electrostatic Headphone with Ultimate Resolution and Precision

The STAX SR-009S represents the pinnacle of STAX’s modern electrostatic headphone development, combining extraordinary transparency with exceptional control, dynamics and realism. As the successor to the legendary SR-009, the SR-009S was designed to preserve ultimate resolution while introducing a slightly more organic and musical tonal balance.

Its specially engineered MLER-2 (Multi-Layer-Electrodes) structure reduces turbulence and internal resonance within the driver assembly, allowing for even greater signal accuracy and lower distortion. Combined with the ultra-light electrostatic diaphragm, the SR-009S delivers astonishing speed, micro-detail retrieval and effortless transparency.

Sonically, the SR-009S presents music with exceptional openness, holographic imaging and remarkable precision. Vocals sound immediate and lifelike, while instruments are rendered with outstanding separation and spatial accuracy. Compared to the original SR-009, the SR-009S introduces a slightly fuller and more physical presentation without sacrificing its analytical capabilities.

Bass performance is exceptionally fast, controlled and articulate, focusing on texture and realism rather than artificial emphasis. Even highly complex recordings remain clean, layered and effortlessly transparent.

Its premium aluminum construction, precise craftsmanship and genuine leather earpads further reinforce the uncompromising flagship character of the SR-009S. For many listeners, it remains one of the most technically capable headphones ever created.

Like all STAX electrostatic headphones, the SR-009S requires a dedicated electrostatic amplifier or energizer with a PRO bias connection.

Technical Specifications