STAX SR-009D

A Modern Interpretation of an Electrostatic Legend

With the SR-009D, STAX reinterprets the legendary SR-009 by combining its iconic transparency and speed with modern engineering, improved comfort and greater everyday usability. The SR-009D is designed for demanding listeners who appreciate the extraordinary resolution of the original 009 series while preferring a slightly more organic and relaxed presentation.

At its core is a newly developed electrostatic driver system featuring an ultra-light diaphragm and optimized electrode structure capable of reproducing even the finest details with astonishing precision. Vocals sound exceptionally clear and tangible, while instruments are rendered with remarkable physicality and spatial depth.

Sonically, the SR-009D combines the speed and openness expected from a flagship electrostatic headphone with a more refined and musical tonal balance than earlier 009 generations. Treble remains airy and highly resolving without becoming analytical or aggressive, while bass performance stays tight, textured and exceptionally controlled.

Compared to the original SR-009, the SR-009D additionally introduces a modern detachable cable system, revised mechanical construction and improved long-term comfort. Premium aluminum craftsmanship and genuine leather earpads further reinforce its uncompromising flagship character.

The SR-009D is especially appealing to listeners seeking ultimate transparency, holographic imaging and natural timbre without sacrificing musicality and long-term listening comfort.

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

Technical Specifications