SR-X9000

Stax

SR-X9000

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The history of X – THE Ω HERITAGE

What is the ideal electrostatic earspeakers? A fixed electrode which reduces air resistance and the effect of reflection. This electrode also has the high sound transparency. This vision was already found in the metal-mesh electrode of SR-X, which was released in 1970. After that, STAX challenged to realize metal-mesh electrodes for SR-Ω in 90’s again. However, the big metal-mesh electrode was difficult to manufacture. So, the mass production was extremely difficult. This is why SR-Ω was produced in small quantities even though this product has high quality sound.

Evolution to “MLER-3”
20 years have passed since SR-Ω was released. In the meantime, the manufacturing technology of metal-mesh was improved. And through the development of SR-009, the know-how of manufacturing multi-layer fixed electrodes evolved. These factors realized the new flagship “SR-X9000”. “MLER-2”, which was installed in SR-009S, evolved into the four-layer “MLER-3”. An etching electrode and a metal-mesh electrode are bonded using the diffused junction (thermocompression bonding). After 2 generations of STAX flagship models, STAX’s manufacturing technology makes a significant contribution to the stable mass production of big round shaped metal-mesh electrodes. For MLER-3, sound transparency evolved more smoothly than conventional multi-layer fixed electrodes. And the rigidity characteristic resistant to vibration also evolved.

Passion for metal-mesh
The round shaped metal-mesh which was installed in SR-X reduced air resistance and the effect of reflection. This increased the sound transparency. So, metal-mesh is the ideal material of fixed electrodes. However, bigger and thinner metal mesh electrodes are poor in rigidity and may make sound unclear. This is the reason why it was too hard to install metal mesh electrodes in STAX products. In 1990s, SR-Ω, in which the metal mesh electrode is installed, was developed. Because the metal mesh electrode was made bigger for this model, it had to be reinforced with an adhesive by hand. This is a very high precision work. So, it was extremely difficult to manufacture metal mesh electrodes for SR-Ω. The stable mass production could not be realized. This is the reason why SR-Ω was sold in very small quantities in spite of its high sound quality.

The diaphragm increases 20% in size compared with the previous flagship model
The diaphragm is made of ultra-thin super engineering plastic film. Due to weight saving close to zero, great transient characteristic is realized. From the base to the high range, the linearity of the sound is improved. The area of the diaphragm increases by 20% compared with SR-009S. This breakthrough realizes the widest sound field ever.

The enclosure which is made of tough machined aluminum eliminates unnecessary vibrations
The enclosure of the sound unit is made of tough machined aluminum. This new design firmly fixes the sound unit and completely eliminates unnecessary vibrations. The sound wave from the unit flows more smoothly. The acoustic characteristic inside the enclosure is improved to realize clearer sound unaffected by sound reflection.

For those that love listening to their music in the comfort of their own home then the Stax range of electrostatic headphones, or earspeakers as they are known, will make a lot of sense. These high end audio earspeakers need an energiser unit to drive them meaning they wouldn’t be your choice if portability is high up on your feature list. Where the Stax earspeakers excel is with the clarity of sound that they’re able to produce. Stax are at the top of the headphone market in terms of the sound that is possible from headphones.

One of the first things that will strike you about the Stax earspeakers is their openness and musicality. This is the difference between dynamic and electrostatic headphones. The reasons for this are that the electrostatic drivers are much larger than dynamic drivers and due to the technology, are quicker to respond. What this actually means is that you’ll be treated to a very musical audio experience with high levels of acoustic detail.

Find out more about the Stax earspeakers by clicking on the products below, or get in touch with our team on 01865 790 879.

Specifications
Specifications of SR-007A Electrostatic Earspeakers:

Type: Push-pull electrostatic open-air type headphone
Frequency response: 6 to 41,000 Hz
Impedance: 170 KΩ (at f = 10 KHz)
Capacitance: 94pF (including cable)
Sensitivity: 100 dB / 100 V r.m.s. at f = 1 KHz
Bias voltage: 580 V / DC
Left & Right Channel identifications:
Left (L) and Right (R) indicators are provided at the cable en trance points on the Earspeakers.
The left channel cable is marked with a solid Line.
The right channel is marked with a dotted Line.
Ear pads : Real leather (Lamb) used on a part coming into contact with the skin. High-quality leather used for
the surrounding part.
Cable: 2.5m, PC-OCC, wide, low capacitance cable
Weight : 365 g (Body) , 512g (Including cable)
Operating temperature range: 0 to 35
Humidity range for use: Less than 90% (without condensation) Specifications of SR-007A Electrostatic
Earspeakers:
Type:

Push-pull electrostatic open-air type headphone
Frequency response: 6 to 41,000 Hz
Impedance: 170 KΩ (at f = 10 KHz)
Capacitance: 94pF (including cable)
Sensitivity: 100 dB / 100 V r.m.s. at f = 1 KHz
Bias voltage: 580 V / DC
Left & Right Channel identifications:
Left (L) and Right (R) indicators are provided at the cable en trance points on the Earspeakers.
The left channel cable is marked with a solid Line.
The right channel is marked with a dotted Line.
Ear pads : Real leather (Lamb) used on a part coming into contact with the skin. High-quality leather used for
the surrounding part.
Cable: 2.5m, PC-OCC, wide, low capacitance cable
Weight : 365 g (Body) , 512g (Including cable)
Operating temperature range: 0 to 35
Humidity range for use: Less than 90% (without condensation)

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