SRM-D50 drives STAX ‘s electrostatic earspeakers and with an onboard high-performance DAC, it supports various audio sources such as audio player and PC.

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The SRM-D50 is a high-performance electrostatic driver and Digital-to-Analog Converter, inspired by the battery-powered SRM-D10. With an elegant all-in-one design, the D50 creates a simple solution for any music lovers to experience the legendary sound of Stax earspeakers.

  • Supports various digital inputs such as USB, optical, and coaxial digital inpu
  • Built-in DAC supports high resolution up to PCM 32/384 KHz or DSD 5.6
  • VU meter displays input strength
  • 4 mm thick nonmagnetic aluminum cover.
  • R core power transformer with less leakage flux


Digital Input:USB (type B) ×1、TOSLINK Optical ×1、COAX RCA ×1
Analog input:RCA ×1
Mains voltage: AC 110V / 60Hz
Power Consumption: 35W
Operating temperature: 0 to 35 degrees (Celsius) (less than 90% humidity, non condensing)

Weight 4.5 kg
Dimensions 192 × 268 × 67 mm


Frequency response

Rated Input Level

130mV r.m.s

Maximum Input Level

30V/ RCA, at minimum volume

Maximum Output Voltage

400V RMS (1130Vp-p)

Harmonic Distortion

Input impendance

Bias Voltage

DC 580V

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