“super engineering plastics”
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.
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.
STAX picked Aluminum for the framework citing the metal’s physical qualities, which they regard as an excellent material for sound chamber suitable for audio equipment. The metal is used extensively throughout the whole design including the outer frame and elements of the framework that houses the driver inside, to realize high-quality sound, rigidity and lightweight. Every part of the SR-009S is manufactured through precise machine processing.
Silver coated high-purity copper wire of 99.9999% (6N) purity are adopted for the cable, built in a structure that is most suitable to drive the ear-speaker.
Handcrafted with a new design, the earpads are made from genuine high-quality leather. The extremely comfortable cushion allows hours of comfortable listening to music.
The arc on the STAX 009S is equipped with a 10-step adjustment mechanism which you could glide to fit different head size.