The SR-009 is a memorable model that appeared in 2011 and became the foundation of the present STAX flagship Earspeaker development. At that time this extraordinary Earspeaker attained a big success as the model that materialized the idea that has been embraced by STAX developers in pursuit of further improvement of sound quality. The memorable model that has achieved the highest peak sound of the STAX present new flagship SR-009S will soon be followed by the SR-009BK as the 80th anniversary limited model in special black color version. The SR-009BK in black finish is the limited production of 180 units in the whole world.
Multi-layer fixed electrode (MLER)
The fixed electrode that drives the whole diaphragm surface consists of three metal sheets unified through precision photograph etching processing on an atomic level using heat diffusion joint technology, which greatly improved the desirable electrode specifications such as planarity, low resonance and high sound wave permeability.
Tough solid aluminum chassis
Tough solid aluminum chassis employed secures firmly the sound element, contributing to improve the clearness of sound. Furthermore, the case thickness has been reduced to the limit, making the flow of condensation-and-rarefaction air wave from the sound element more smooth.
Notation of 80th anniversary
Anniversary model notation is printed at cable attachment part.
Specification
Type: push-pull electrostatic large 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
Bias voltage: DC580V
Weight: 596g (including cable), 454g (without cable)
Earpad: Genuine sheep 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
