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Stax SRH-009 Reference Earspeaker/SRM-007Mk2

$9,698.00 inc. GST

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Description

MUSICAL MILLENNIUM.
If a technology is not suitable for music, you should not adopt it even if it is a high-tech.
Every technology should contribute to music reproduction.
The SR-009 is the product of the repeated research trip to technology and material search without deviating from our stance to return to live sound and music always with refined sensitivity.

PRIDE AND JOY
It will exactly be as a result of “work” each predecessor piled up, if a race, a company, and an individual have “pride”. And it clearly depends on the way of life we live now to inherit it and to bear “enhancement” and “evolution.” Simply this is proven by the fact that the state-of-the-art technologies in the world exist intensively in present-day Japan . Making valuable new things full of creativity by skillfully taking advantage of these technologies has given birth to a “millennium” earspeaker (electrostatic headphone).

TECHNOLOGY AND MATERIAL

DIAPHRAGM: MORE THINLY !
The newly developed sound element has been adopted in the SR-009. New high polymer ultra-thin film material called the super engineering plastics – the reinforced material of the conventional engineering plastics – is employed for the diaphragm of the sound element. Materials superior especially in tone quality have been selected to attain the extremely excellent frequency characteristic from low to super-high as well as the vast dynamic range.

ELECTRODES: (1)
New electrodes named MLER (Multi Layer ElectRodes) have also been developed to realize the plane drive of the whole film diaphragm surface. While infinite thinness and flatness are required for the fixed electrodes, they simultaneously need to have other characteristics such as low resonance, high transmissivity of sound wave, and so on. The entirely new electrodes have been completed through the unification of metal plates processed with ultra-precision photograph etching using the high technology of heat diffusion combination on the atomic level.

ENCLOSURE:(5) (6)
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: (4)
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: (2)
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):(7)
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 circular sound element, open-air type enclosure●Frequency response: 5 – 42,000Hz●Electrostatic capacitance: 110pF (including cable)●Impedance: 145kΩ (including cable, at 10kHz)●Sound pressure sensitivity: 101dB / input 100Vr.m.s. / 1kHz

●Maximum sound pressure level: 118dB / 400Hz

●Bias voltage: 580V DC

●Right/left channel indication: ‘L’ and ‘R’ indicated on the arc assembly (inside head spring), solid line (left) and dotted line (right) on the cable

●Earpad: real leather (skin touching portion), high-quality artificial leather (surrounding portion)

●Cable: silver-coated 6N (99.9999%) OFC parallel 6-strand, low-capacity special wide cable, 2.5m full length

●Weight: 596g (including cable), 454g (without cable)

■ Specifications and appearance are subject to change for improvement.SR-007 Photo

 

The joy of pure balance amplification 

The operational principle of the electrostatic condenser type is based on a system whereby plus and minus output signals are input by push-pull into two electrodes sandwiching a diaphragm with a high level of accuracy and equidistantly, resulting in the vibration of an ultra-thin membrane through the repulsive force and suction force of static electricity, which is then converted into sound. The balance method, which is considered to be the ideal for amplification, is thus extended to speakers. The electrostatic system entails input by balance, output by balance, and sound conversion by balance, and, in realizing all these features, constitutes the perfect balance system. It is the only system that makes it possible to listen to sound in the ideal manner permitted by the balance system. The new SRM-007tII is our flagship model of a driver unit intended exclusively for earspeakers characterized by their wide range, high dynamic range and outstanding operating features with full allowance made for SACD and other new-generation high-density formats. The ultra-light polymer film, only a few microns thick, realizes unprecedented response and a high degree of resolution. Since it is driven on all sides, there is almost no partitioned vibration and there is no phase distortion. Nor is there any imbalance in the sound quality of the unit or distortion caused by the network. Electromagnetic distortion also does not occur. It opens up on the world of high sound quality that is the mark of headphone listening, a world characterized by the absence of need for large output, the high degree of freedom permitted by the use of high sound quality elements for use with small signals, and the even balance between left and right unaffected by acoustic conditions in the listening room. 

■ Features 

●We’ve taken another look at circuit constants and achieved a higher grade of reproducibility for SACD and other new-generation audio formats.
●Consists of a pure balance amplifier in which the XLR balance input does not have to pass through a transformer, an inversion amplifier, etc.
●Makes use of a simple two-stage amplification structure based on rigorously selected low-noise FET. The load resistance makes use of non-inductive coil resistance manufactured by Dale, thus realizing straightforward properties that take advantage of the features of vacuum tubes and outstanding sound quality with a high level of clarity.
●The output stage is designed to lower impedance by using a rigorously selected high voltage dual triode (6FQ7 type) in parallel connection, which has resulted in an improvement in dynamic range especially in the high frequency.
●The heater power source for the vacuum tube makes use of a power circuit of the DC ignition type using an electrolytic condenser and a high-speed Schottky barrier diode, bringing about further improvements in the SN ratio.
●Makes use of a large-capacity power transformer and capacitor.
●Equipped with one XLR (balance) input system and two RCA (imbalance) input systems, meaning that there is a total of three input systems.
●In the case of the RCA input, switching with the earth side ensures that there is almost no interference between devices.
●Use is made of a high sound quality quadruple volume unit which makes possible XLR input as well as all kinds of line level analog voice inputs.
●The RCA terminal “Input 1” is equipped with parallel output terminals and enables input throughout. Connection with other pre-amplifiers and recording decks, etc., is also possible.
■ Specifications
●Frequency responseDC-100 KHz / +0, -1.5 dB SR-007 or SR-404 Signature, when using 1 unit
●Rated input level200 mV / 100 V Outputs
●Maximum input level30 V r.m.s. / at Minimum volume
●Amplification54 dB (x 500)
●Total harmonic distortion0.01% / 1 KHz, 100 V r.m.s. output SR-007 or SR-404 Signature, when using 1 unit
●Input impedance50 KΩ / XLR balance 50KΩ×2
●Number of inputsRCA×2, XLR×1 (balanced)
●Maximum output voltage340 V r.m.s. / 1 KHz
●Standard bias voltageDC 580 V
●Power voltage120-240V ±10%, 50 to 60 Hz (adjusted for your area)
●Power consumption55 W
●Temperature range for useBetween 0º and 35ºC, max. 90% (no condensation)
●External dimensions195 (w) x 103 (h) x 420 (d) mm (including VR knob and pin jack (20 + 10)
●Weight4.7 Kg
●Vacuum tubes6FQ7/6CG7 type x 4
The standards and external appearance of this unit may be changed without prior notice in order to make improvements.

 

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