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Stax introduce the world’s first portable DAC and electrostatic amplifier

Precision machined from solid billets of aluminium, the two-piece case of the SRM-D10 goes through multiple processes to ensure a smooth luxury velvet feel. Fit and finish, like all Stax products is superb and with its striking industrial design, SRM-D10 is a piece you won't want to hide away. At 141mm wide, 75mm deep and 32mm high, the SRM-D10 is also truly compact

High-resolution playback

On the digital side, the SRM-D10 uses XMOS USB interface support for DSD 5.6MHz signal playback and PCM audio with up to 384KHz sample rate.

State-of- the-heart

On the digital conversion side, Stax chose to use the ESS ES9018 DAC. Renowned for its superb sound quality, the ES9018 is then fed to a TI OPA1642 ultra-low distortion op-amp to ensure the delicate bitstream remains unaltered.

Stax also has a world first

The SRM-D10 uses an Astronautic level high voltage amplifier to provide the drive and high voltage necessary for the electrostatic diaphragm. This high voltage amplifier is based around a chip from a company called Apex. Apex manufacturer the highest quality parts for the aerospace and medical industries. The Apex chip used in the SRM-D10 is the same as that used in the Apache helicopter. This chip together with the new output stage developed for the SRM-D10 is the most advance Stax has ever made for any energiser.

Selected components

Audiophile grade components complete the output stage, ensuring the SRM-D10 drives any Stax Earspeaker to its full potential. On the rear of the SRM-D10, a switch is provided to select either a digital input or the analogue input.

Separate power supply

A separate power supply provides the necessary voltage for re-charging the Lithium-Ion battery in the SRM-D10. During use, the SRM-D10 will give 5 hours use on the analogue input and 4 hours on the digital input.


  • 5-pin PRO bias Stax earspeaker output
  • MicroUSB digital input,
  • 3.5mm analog input
  • Supply voltageDC 14V (charger included)
  • Frequency response20Hz - 40KHz (+0dB,-3dB)
  • Rated input level230mV (100V output)
  • Harmonic distortion<0.025% / 1KHz-10KHz
  • Input impedance10 KΩ (analog input)
  • Maximum output voltage200Vr.m.s / 100Hz-10KHz
  • Power consumption6.4W (USB input) 5W (analog input)
  • Recommended operating temperature0-35°C, <90% RH (No condensation)
  • Dimensions75(W) X 32(H) X 141(D) mm
  • Net weight450g
  • Voltage100-240V/50-60HZ
  • Warranty1-year limited warranty

Backed with a 2-year Stax warranty

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Delivery Information

As a company our primary goal is to provide a seamless service that results in customer satisfaction. We aim to deliver within 3 working days. Unfortunately, there may be occasions where this time frame may not be met due to unforeseen circumstances; in this instance, we deliver product/s as soon as we can. All delivery charges are included within the prices quoted, unless otherwise specified.

All small items are usually delivered between 9am and 6pm, on a Monday to Friday, unless a Saturday delivery is requested. Follow My Parcel is an industry-changing innovation from DPD Local, which will give your customers unparalleled levels of information and peace of mind.Not only will your customers receive a one hour delivery timeslot, but they’ll now also be able to track the progress of their parcels on a map as our drivers make their way to the delivery addresses. Follow My Parcel will: