STAX SR-X9000 Electrostatic Headphones

SR-X9000 is the new flagship Earspeaker that marks the pinnacle of Stax electrostatic headphones production. A major technology advancement is the “MILER-3” (Multi-Layer-Elect-Rords) – a four-layer fixed electrode combining mesh electrodes and conventional etching electrodes that are crimped by thermal diffusion bonding. The newly developed manufacturing technique matures through a 20-year accumulated research and development, allowing a rigid structure that is resistant to resonation while smoothly evolving the transmission characteristics of sound compared to conventional multilayer fixed electrodes.

A product development story: the circular metal mesh once mounted on the SR-X was one of the ideal electrodes to reduce the effects of air resistance and reflections and increase sound permeability. However, there was a big hurdle in installing metal mesh electrodes in products because they lack strength and are resonant-prone that causes playback sound to become muddy. In the 1990s, the original SR-Ω was developed with the goal of increasing the size of the metal mesh; however, the manufacturing technique was at its infancy as it was unpractical to produce stable products. As a matter of fact, there was only a few pairs of SR-Ω were made.

The SR-X9000 diaphragm is made of ultra-thin engineering film that is 20% larger than the previous flagship SR-009S. The diaphragm mass has been reduced to create a lightning-fast reaction speed and high-frequency response range that elevates headphone listening to a whole new level.

ENCLOSURE:
Aluminum is a metal good for sound and suitable material for audio equipment. It is abundantly used, e.g. at the frame supporting the appearance and sound element, to realize high-quality sound, rigidity and lightweight. Almost every part of the SR-009 is manufactured through precise machine processing.

CABLE:
The high-purity copper developed from the necessity of wiring large-scale integration circuits is also known as high-quality audio cables. High-purity copper wire of 99.9999% (6Nines) purity adopted for the cable is further silver-coated and finished with the most suitable structure to drive the earspeaker.

EARPAD:
The earpad of a new design is carefully made by a craftsman’s hand and features both the real leather with good humidity environment and the cushion material with moderate elasticity.

The new earpad enables hours of comfortable listening to music.

ARC (head band):
The arc is equipped with a position adjustment mechanism of 10-step slider and corresponds to the wide range of cranial form with individual difference.

Specifications:

Type: push-pull electrostatic sound element, open-air type enclosure

Sound element shape: large round shape　

Fixed electrode: MLER-3 (Multi Layer Electrodes)

Frequency response: 5 – 42,000Hz

Electrostatic capacitance: 110pF 　

Impedance: 145kΩ 　

Sound pressure sensitivity: 100dB　

Bias voltage: 580V DC

Attached cable conductor: 6N(99.9999%)OFC + silver plated annealed copper wire

Cable: parallel 6-strand, low-capacity wide cable

Cable length: 2.5m,1.5m

Ear pad: genuine sheep leather (skin touching portion), artificial leather (surrounding portion)

Weight: 432g (ear speaker)

In the box

• STAX SR-X9000 headphone x 1
• Storage box x 1
• Owners manual x 1