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The wait is over, now hear what everyone is talking about! The STAX SR-X9000 electrostatic headphone sets the bar for premium headphones.

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Featuring their brand new developed fixed electrode "MLER-3" evolved metal-mesh diaphragm, the size of which has been increased by 20% compared to SR-009S. This breakthrough realizes the widest sound field ever.

Pair your X9000 with a premium amp and hear music like never before!

HeadAmp's electrostatic amplifiers are designed to showcase top of the line electrostatic headphones at their best. Choose our all-new flagship Grand Cayman or our revered Blue Hawaii Special Edition to pair with your X9000 today!

Concept from the signature model SR-Omega, together with luxury packaging in wooden box. Its appearance revives a very nostalgic memory for STAX fans with a clear and warm quality sound.

All new Diaphragm

SR-X9000 is the new flagship earspeaker which surpasses SR-009. The four-layer fixed electrode “MILER-3” is installed. Combining a big metal mesh, STAX evolved the multi-layer MLER-2. Because metal-mesh reduces air resistance and the effect of reflection, it has the high sound transparency. So metal-mesh is the ideal material of fixed electrodes. But so far mesh-metal was difficult to manufacture and not installed in fixed electrodes. However, using the diffused junction (thermocompression bonding) technology that STAX acquired when manufacturing SR-009 and SR-009S, metal-mesh can be used as the material of fixed electrodes.

The diaphragm is made of ultra-thin super engineering plastic film. Due to weight saving close to zero, great transient characteristic is realized. From the base to the high range, the linearity of the sound is improved.

The enclosure of the sound unit is made of tough machined aluminum. This new design firmly fixes the sound unit and completely eliminates unnecessary vibrations. The sound wave from the unit flows more smoothly. The improved acoustic characteristic inside the enclosure realizes clearer sound unaffected by sound reflection. The guard mesh which is installed parallel to the sound element generates the direct reflections which affect a bad influence on the sound. This problem is solved for SR-X9000. The guard mesh has pillars of different lengths in front and back. This design changes the height of the gap between the sound element and the guard mesh. So the guard mesh cannot be parallel to the sound element and the reflection angle is completely controlled. The sound wave flows smoothly.

Redesigned For Improved Comfort and Durability

The main material of the arc assembly is upgraded to stainless steel. The arc assembly is more tolerant to torsion and the earspeaker more stably fits your ears. The material of the head pad which directly contacts to the skin is genuine leather. The position can be adjusted by the slider parts with 9 step clicking system.

The material of the ear pads is genuine leather (sheep skin) which has excellent breath-ability and softness. Genuine leather makes the earspeaker to closely fit your ears for a long time and you can fully enjoy the high quality bass and vivid sound. This also reduces fatigue and you can comfortably listen to the music for a long time. The storage case is made of “paulownia wood” which has low thermal conductivity and humidity control capacity. This case is an excellent storage solution alongside the Official Stax Headphone Cover!

Featuring Modular Cable System

The material of the core cable is a 6NCu ultra-pure annealed copper wire ( φ 0.14×3). The material of the around core cable is a silver plated annealed copper wire ( φ 0.08× 9). So high and low frequency is improved. The cable can be changed. 2 cables (2.5m and 1.5m) are included and you can choose the cable according to your listening style.

What's Included

• Stax SR-X9000 Headphone

• One each, 1.5m & 2.5m removable cable

• Paulownia Wood Storage Case

• Single Earpad pair made of Genuine sheep and artificial leather


STAX SR-X9000 Information Sheet

STAX SR-X9000 Owner's Manual

The Specs

Headphone Type
Open-Back, Over-Ear

100dB / 100Vrms

Frequency Response
5Hz - 42kHz



Campfire Satsuma Packaging

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About STAX

STAX produce exclusively electrostatic headphones, or “earspeakers” as they call them, in Japan, since 1938. STAX chose the electrostatic technology for its ability to produce transparent sound, and low weight for comfort/ergonomics, both due to the driver design not employing fixed magnets and moving coils, as opposed to other common headphone driver designs. The minimal weight of the driver ensures a very quick response to the signal, creating a more faithful sound reproduction.