The STAX SR-X9000 is STAX’s uncompromising flagship electrostatic headphone delivering holographic staging, extraordinary naturalness and ultimate resolution.

Stax headphones require an electrostatic amplifier with a Pro Bias connector. All Stax headphones and matching amplifiers are listed on the Stax brand page.

STAX SRM-270S – compact electrostatic amplifier with discrete FET circuitry and classic STAX transparency for entering the world of electrostatic Earspeakers.

Only suitable for electrostatic headphones with a Pro Bias connector, such as the Stax Earspeakers. Dynamic and planar magnetic headphones cannot be connected.

STAX SRM-400S – discrete FET electrostatic amplifier with 400 Vrms output voltage, high resolution and controlled, balanced sound for STAX Earspeakers.

Only suitable for electrostatic headphones with a Pro Bias connector, such as the Stax Earspeakers. Dynamic and planar magnetic headphones cannot be connected.

STAX SRM-500T – high-quality hybrid electrostatic amplifier with FET input stage, tube output stage, and natural spacious sound for STAX Earspeakers.

Only suitable for electrostatic headphones with a Pro Bias connector, such as the Stax Earspeakers. Dynamic and planar magnetic headphones cannot be connected.

STAX SRM-700S – uncompromising high-end electrostatic amplifier with discrete FET circuitry, exceptional resolution, and outstanding control for the most demanding STAX Earspeakers.

Only suitable for electrostatic headphones with a Pro Bias connector, such as the Stax Earspeakers. Dynamic and planar magnetic headphones cannot be connected.

Hybrid electrostatic amplifier from STAX with FET input, 6SN7 tube output stage, fully balanced design and warm, spacious high-end performance.

Only suitable for electrostatic headphones with a Pro Bias connector, such as the Stax Earspeakers. Dynamic and planar magnetic headphones cannot be connected.

Ultra-compact electrostatic DAC/headphone amplifier from STAX with battery operation, ESS DAC and genuine STAX performance for portable and space-saving high-end setups.

Only suitable for electrostatic headphones with a Pro Bias connector, such as the Stax Earspeakers. Dynamic and planar magnetic headphones cannot be connected.

Compact electrostatic DAC/headphone amplifier from STAX with ESS DAC, exceptional transparency and genuine high-end performance for modern desktop setups.

Only suitable for electrostatic headphones with a Pro Bias connector, such as the Stax Earspeakers. Dynamic and planar magnetic headphones cannot be connected.

Flagship electrostatic amplifier from STAX featuring a hybrid tube/MOSFET design, exceptional control and uncompromising high-end performance for the most demanding earspeaker systems.

Only suitable for electrostatic headphones with a Pro Bias connector, such as the Stax Earspeakers. Dynamic and planar magnetic headphones cannot be connected.

Electrostatic headphone and tube energiser from the same house: everything you need to hear why Stax has been a league of its own for decades.

The headphone people mix on and the unit that sits behind it in the studio: neutral, measurable, uncompromisingly honest.