STAX
SR-X9000
The flagship of Stax's electrostatic headphone line. The SR-X9000 is an open-air, push-pull electrostatic earspeaker and the spiritual successor to the legendary SR-Omega. Engineered for listeners who demand the absolute best.
Key Features
MLER-3 Electrode System
Four-layer advanced fixed electrodes created via thermal diffusion bonding, reducing resonance for exceptional sound transparency.
Premium Build
Large circular sound element housed in an industrial-chic metal and aluminum frame. Real sheep leather and artificial leather earpads for extended listening comfort. Weight: 432g.
Ultra-Wide Frequency Response
5 Hz – 42,000 Hz — capturing detail far beyond the range of conventional headphones.
Open-Air Design
Delivers a natural, spacious soundstage with the speed and precision that only electrostatic technology can provide.
Specifications
| Specification | Detail |
|---|---|
| Driver Type | Push-pull electrostatic |
| Frequency Response | 5 Hz – 42,000 Hz |
| Bias Voltage | 580V DC |
| Weight | 432g |
| Earpads | Real sheep leather / artificial leather |
Important Note
Requires a dedicated electrostatic amplifier/energizer (580V DC bias), such as the Stax SRM-700S or SRM-T8000. Not compatible with standard headphone outputs.