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.