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Stax - SRM-D50


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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 lover to experience the legendary sound of Stax earspeakers.


  • Supports various digital inputs such as USB, optical, and coaxial digital input
  • 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


  • Frequency response: 20Hz - 40kHz (+/-3dB)
  • Rated Input Level: 130mV r.m.s
  • Maximum Input Level: 30V/ RCA, at minimum volume
  • Maximum Output Voltage: 400V RMS (1130Vp-p)
  • Gain: 59 dB
  • Harmonic distortion: 0.025% or less/1kHz-10kHz /When use with SR-L series
  • Input Impedance: 20kΩ (RCA)
  • Bias Voltage: DC 580V
  • 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)
  • Dimension: 7.55(W) x 2.63(H) x 10.55(D) inches, 192(W)×67(H)×268(D) mm
  • Weight: 9.9 lbs / 4.5 kg