STAX SR-009S Ex-Demonstration Electrostatic Earspeaker

This ex-demonstration STAX SR-009S is sold with full manufacturer warranty, in excellent condition, and supplied with all original packaging and accessories.

For delivery enquiries, product information, or to book your personal audition, please telephone 01603 627010.

Premium Japanese-Engineered Reference Electrostatic Earspeaker

The STAX SR-009S represents the pinnacle of STAX's electrostatic earspeaker technology. This flagship model delivers unparalleled sonic transparency and resolution, providing a reference-quality listening experience that reveals the most minute musical details with exceptional tonal balance and spatial presentation.

Advanced Second-Generation Electrode Technology

This ex-demonstration earspeaker features STAX's latest electrode innovations:

• MLER2 (Multi-Layer-Elect-Rords) second-generation fixed electrode design
• Enhanced edge-smoothing process reducing air resistance for improved sound permeability
• Gold-plated electrode material with high specific gravity to minimise resonance
• Reduced electrical resistance through gold plating for superior signal transfer
• Large circular sound elements providing optimal diaphragm control across the entire frequency range

Ultra-Thin Film Diaphragm Implementation

The SR-009S earspeaker utilises cutting-edge diaphragm technology:

• Super engineering plastic film of ultra-thin construction
• Exceptionally low mass yielding superior transient response throughout the audio spectrum
• Push-pull electrostatic driver configuration ensuring minimal distortion
• Extended frequency response spanning 5Hz to 42,000Hz for true full-range reproduction
• High sensitivity of 101dB for dynamic headroom with compatible amplification

Precision Cable Architecture

The STAX electrostatic earspeaker features premium signal delivery:

• Silver-plated 6N (99.9999%) OFC conductors for minimal signal loss
• Parallel 6-strand configuration reducing inter-conductor interference
• Low-capacity special wide design for optimal signal transfer characteristics
• 2.5-metre full length providing practical listening distance from amplifier
• Golden solid line (left) and dotted line (right) channel identification system

Premium Materials Selection

The SR-009S exemplifies STAX's commitment to quality materials:

• Genuine leather ear pads for comfort at skin contact points
• High-quality artificial leather surrounds ensuring durability and consistent acoustic seal
• Precision-engineered housing components minimising unwanted resonances
• Lightweight construction with headphone-only weight of 441g (without cable)
• Total system weight of 563g including cable

Technical Specifications

The STAX SR-009S offers reference-level performance specifications:

• Electrostatic capacitance: 110pF (including cable)
• Impedance: 145kΩ (including cable, at 10kHz)
• Bias voltage requirement: DC 580V
• Frequency response: 5-42,000Hz
• Type: Push-pull electrostatic large circular sound element

Condition and Warranty Statement

This ex-demonstration STAX SR-009S offers the opportunity to acquire STAX's flagship reference electrostatic earspeaker at a reduced cost compared to purchasing new, while maintaining full warranty protection. The unit has been meticulously maintained in our demonstration room and presents in excellent cosmetic and functional condition.

To arrange your personal demonstration of this ex-demonstration STAX flagship earspeaker, please contact us using the telephone number above.