The SR-009S features an ultra-thin diaphragm made from advanced super-engineering plastic film. Its exceptionally low mass delivers outstanding transient response across the entire audio spectrum, reproducing music with remarkable speed, clarity, and precision.

The main body has been redesigned to further reduce resonance, helping achieve a more consistent and natural sound.

ENCLOSURE:

Aluminium is widely valued in audio design for its strength, light weight, and excellent acoustic properties. In the SR-009S, aluminum is used extensively throughout the enclosure, including the frame that supports both the exterior structure and the sound element.

Nearly every part of the SR-009S is manufactured using precision machining, contributing to its rigidity, durability, and refined sound quality.

The SR-009S uses high-purity copper originally developed for large-scale integrated circuit wiring and now recognized as an excellent material for high-quality audio cables.

Its cable is made from 99.9999% pure 6N copper, silver-coated and arranged in an optimized structure designed specifically to drive the earspeaker with accuracy and stability.

ARC (Headband):

The arc assembly features a 10-step slider adjustment mechanism, allowing the headband to accommodate a wide range of head shapes and sizes. This ensures a stable, personalized fit for long listening sessions.

SPECIFICATIONS SR-009S

Type : Push-Pull Open Back Circular Electrostatic Headphone

Frequency response : 5 – 42,000 Hz

Electrostatic capacitance : 110 pF, including cable

Impedance : 145 kΩ, including cable, at 10 kHz

Sound pressure sensitivity : 101 dB / 100 V r.m.s. at 1 kHz

Maximum Sound Pressure : 118 dB / 400 Hz

Bias Voltage : 580 V DC

Left & Right Identification : “L” and “R” indicated on the arc assembly, inside the head spring. Left channel cable is marked with a solid line; right channel cable is marked with a dotted line.

Ear Pads : Genuine lamb leather for direct skin contact; high-quality synthetic leather for the surrounding portion

Cable : Silver-coated 6N OFC, 99.9999% purity, parallel 6-strand, low-capacity special wide cable, 2.5 m full length

Weight : 1 lb without cable / 1.3 lb with cable

Origin : Made in Japan