STAX SR-007S
Ülevaade
Culmination of over six decades of Japanese expertise in electrostatic technology, the STAX SR-007S represents the latest evolution of the Omega II series, a legendary line that has marked the history of audiophile headphones since 1998. This model combines meticulous technical innovations with a timeless sound philosophy, offering a unique approach to music reproduction where precision and naturalness converge in remarkable balance.
Elektrostaatiline tehnoloogia: radikaalselt erinev lähenemine
The SR-007S continues the electrostatic tradition that STAX initiated in 1960 with the world’s first headphone of this type, the SR-1. Unlike conventional dynamic headphones that use coils and magnets, the electrostatic system is based on a fundamentally different principle. An ultra-thin polymer diaphragm, less than 2 microns thick, is suspended between two fixed perforated electrodes. This diaphragm, maintained under a constant tension of 580V, oscillates under the effect of audio signal variations applied to the electrodes in a push-pull configuration.
This architecture has intrinsic determining advantages. The almost negligible mass of the diaphragm allows for an exceptionally fast transient response, while the total absence of magnets eliminates any magnetic distortion. The new circular electrodes of the SR-007S benefit from a 20% reduction in the diameter of the perforations compared to previous generations, the result of a high-precision etching process that optimizes the overall acoustic profile.
Ümberkonstrueeritud mehaaniline ehitus mugavuse ja jäikuse ümber
The physical architecture of the SR-007S demonstrates particular attention to structural details. The headband, made of a seamless stainless steel plate, now integrates the anti-resonance structure (ARS) directly inspired by the flagship SR-X9000 model. This innovation significantly reduces parasitic vibrations while improving the overall rigidity.
The newly designed movable hinge system allows for natural adaptation to all cranial morphologies, while the rubberized material on the headband preserves the automatic adjustment characteristic of the SR-007 series. The genuine lambskin ear pads, equipped with a free rotation mechanism, perfectly fit the contours of the face. The redesigned internal cushion improves acoustic absorption and contributes to more precise and expansive spatialization.
The signature brown finish, a visual legacy of the SR-007 line, demonstrates a desire for aesthetic continuity. Weighing 430 grams without the cable, the SR-007S maintains an optimal balance between structural robustness and prolonged use comfort.
Technical evolution: what distinguishes the SR-007S from its predecessors
The history of the SR-007 series reveals a technical progression marked by subtle but significant modifications. The original SR-007 MK1, devoid of a bass port, offered remarkably linear bass extension down to about 10 Hz. The MK2 introduced a port in the shells, a controversial modification that created a slight bump in the lower midrange while reducing extension in the deep bass. This characteristic led many users to resort to the famous “BluTak mod,” which involved sealing this port to restore the characteristics of the MK1.
The SR-007S marks a return to the roots by definitively removing this controversial port. The diaphragms have been completely rethought, as have the fixed electrodes that benefit from the high-precision etching process mentioned earlier. This approach allows for a frequency response extending from 6 Hz to 41 kHz with a sensitivity of 101 dB for 100V RMS, parameters that testify to an exceptionally extended reproduction capability.
A detachable cable for easier maintenance
A major practical innovation, the SR-007S adopts the detachable cable system now standard on new STAX models. The 2.5-meter cable uses a parallel construction with 6 strands of OFC (Oxygen-Free Copper) with very low capacitance, ensuring signal transmission without alteration. This modularity greatly simplifies maintenance and extends the product’s lifespan, while allowing for potential future cable upgrades.
Essential electrostatic amplification
A characteristic inherent to electrostatic technology, the SR-007S absolutely requires a dedicated amplifier, called an “energizer” in STAX terminology. These specialized devices not only provide the constant 580V bias voltage essential for the diaphragm’s operation but also generate high-voltage audio signals in a symmetrical configuration.
STAX offers a complete range of amplifiers, from transistor models like the SRM-400S to hybrid tube versions such as the SRM-700T or the SRM-007tII. High-end models like the SRM-T8000 represent the pinnacle of STAX electrostatic amplification. Other specialized manufacturers also offer compatible amplifiers, notably HeadAmp with its legendary Blue Hawaii SE, Mjolnir Audio with its KGSSHV models, or Woo Audio with the WES.
Dokumentatsioon
Prantsuse
Tehnilised omadused
Akustilised omadused
- Tüüp: avatud struktuuriga elektrostaatiline push-pull kõlar
- Muundurid: suurformaadised membraanid, optimeeritud fikseeritud elektroodid
- Sagedusribalaius: 6 Hz – 41 000 Hz
- Tundlikkus: 101 dB / 100 V RMS
Elektrilised omadused
- Elektrostaatiline mahtuvus: 110 pF
- Impedants: 145 kΩ
- Eelpinge: 580 V DC
Kaabel ja ühenduvus
- Eemaldatav kaabel
- Konstruktsioon: 6 paralleelset OFC (hapnikuvaba vase) juhet
- Omadused: madal mahtuvus, kõrge täpsus
- Pikkus: 2,5 m
Disain ja mugavus
- Saumata roostevabast terasest peahoop
- Liikuv liige optimaalse kohandamise jaoks
- Vabalt pöörlevad lambanahast pehmendid
- Ümber kujundatud sisemine pehmend parema helistiku jaoks
- Antiresonantsne struktuur (ARS), inspireeritud SR-X9000 mudelist
Üldised andmed
- Kaal: 430 g (ilma kaablita)
- Viimistlus: STAX-i signatuurses pruunis toonis
- Tootmine: toodetud Jaapanis
Korduma kippuvad küsimused
What is the difference between the SR-007S and the previous SR-007 MK1 and MK2 models?
The SR-007S combines the best aspects of its predecessors: it returns to the portless architecture of the MK1 for optimal bass extension while integrating completely rethought diaphragms and electrodes. The anti-resonance ARS structure and rotating ear pads constitute substantial ergonomic and acoustic improvements absent from previous versions.
Can I use the SR-007S with a conventional headphone amplifier?
No, absolutely not. Electrostatic headphones require specialized amplifiers providing a 580V bias voltage and high-voltage audio signals. A conventional amplifier cannot physically operate an electrostatic headphone. All current STAX amplifiers are compatible, as well as those from other manufacturers respecting STAX’s “Pro” standard.
What amplification power is needed to fully exploit the SR-007S?
The SR-007 series is known for its high amplification requirements. Entry-level STAX models may seem limited in dynamics and bass control. Amplifiers from the SRM-700 series or higher, as well as high-end models from other manufacturers (HeadAmp, Mjolnir, etc.), truly reveal the headphone’s potential.
How does the comfort of the SR-007S compare to other STAX headphones?
The rotating lambskin ear pads and automatic adjustment system offer remarkable comfort even during extended listening sessions. The weight of 430g remains reasonable for a headphone in this category. The ear pads naturally adapt to all morphologies, including for glasses wearers.
Is the SR-007S suitable for all music genres?
Its neutrality and exceptional resolution make it a versatile transducer. The extended bass response satisfies electronic and jazz music lovers, while the finesse of the highs and the precision of the mids appeal to classical and acoustic music enthusiasts. Its slightly warm character avoids any listening fatigue, even with medium-quality recordings.
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- GTIN / EAN : 4996476001114
