STAX SRM-D10 II

Portable electrostatic DAC/headphone amplifier with genuine STAX technology

With the SRM-D10 II, STAX continues a concept that once seemed nearly impossible: a true electrostatic headphone amplifier in a portable form factor. The second generation of this compact driver unit combines modern DAC technology, battery operation and the unmistakable STAX sound signature in an impressively small chassis, making it ideal for high-end desktop and portable listening setups alike.

The SRM-D10 II features a fully discrete electrostatic amplifier design while also integrating a high-quality ESS DAC with USB-C connectivity. This allows direct use with modern computers, smartphones and streamers without requiring additional components. Thanks to its internal battery operation, the amplifier also remains isolated from many forms of power-line noise, making it especially appealing for quiet listening environments and mobile use.

Sonically, the SRM-D10 II stays true to classic STAX philosophy: lightning-fast transients, exceptional microdetail retrieval and an impressively open spatial presentation. Especially when paired with modern Lambda-series earspeakers or the SR-X1, the amplifier delivers a highly resolving yet effortless presentation that demonstrates why electrostatic headphones remain so special even decades later.

Compared to the original SRM-D10, the second generation introduces modern USB-C connectivity, improved power management and further optimized internal circuitry. Its compact aluminum chassis feels robust and refined, making the SRM-D10 II one of the most elegant ways to enjoy genuine electrostatic headphone performance outside of a traditional stationary system.

Highlights

• Portable electrostatic headphone amplifier with integrated DAC
• Battery-powered operation for portable and low-noise listening
• ESS DAC with high-resolution PCM and DSD support
• USB-C input for modern computers and mobile devices
• Fully discrete electrostatic amplifier design
• 580V PRO bias output for modern STAX earspeakers
• Compact aluminum chassis with premium construction
• Ideal for desktop, travel and portable high-end systems
• Classic STAX sound with exceptional transparency and speed

Technical Specifications