Stax SRM-D50 Electrostatic Energiser / DAC - Ex Display
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Stax SRM-D50 Electrostatic Energiser / DAC - Ex DisplayStax SRM-D50 Electrostatic Energiser / DAC - Ex DisplayStax SRM-D50 Electrostatic Energiser / DAC - Ex Display

Stax SRM-D50 Electrostatic Energiser / DAC - Ex Display

£790.83 Exc. VAT |  


Stax SRM-D50 Electrostatic Energiser / DAC - Ex Display

Exquisitely built

The entire chassis is made from Aluminium reducing the effects of magnetic interference. The SRM-D50 features a one piece wrap round lid. This lid goes through several processes to achieve a smooth velvet feel. The Stax logo is engraved into the top of the lid.

High-resolution playback

On the digital side, the SRM-D50 uses an XMOS USB interface support for DSD 5.6MHz signal playback and PCM audio with up to 384KHz sample rate.

High End DAC

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.

Multiple input selection

The SRM-D50 features three digital inputs: USB, S/PDIF on RCA and Optical. Analog input is via RCA.

Traditional Stax amplifier circuit

The SRM-D50 features an original low noise dual FET first stage, connecting to a all stage direct coupled Class A DC amplifier, which features no coupling capacitors. This allows for the smallest nuances in the music to be reproduced. Improvements to the emitter follower at the output stage results in a extended dynamic range, natural tonality and inner detail. Carefully selected components have been chosen not just for their long life and reliability but equally for their tonal quality and unmatched performance.

VU Meter

The SRM-D50 is fitted with a VU to monitor input level. If connected to a variable output component the meter can be used to monitor input level and in turn avoid input clipping.

The SRM-D50 is a new generation electrostatic energiser

It allows multiple source selection, including high resolution USB audio interface, S/PDIF and optical connection. This is coupled with traditional analog connection. Overall the SRM-D50 is a combination of modern aesthetic design, high quality digital signal processing and the values of traditional Stax craftsmanship


  • Supports various audio sources such as USB / optical / coaxial digital input, RCA analog input etc.
  • ESS DAC chip supports files with audio signal maximum DSD 5.6 MHz, PCM 384 KHz.
  • Adopt R core power transformer with less leakage flux.
  • Displays the strength of input signal with VU meter.
  • Adopted 4 mm thick nonmagnetic aluminum cover


  • Frequency responce:DC-40kHz (0,-3dB)
  • Rated Input Level:130mVr.m.s
  • Maximum Input Level:30V/ RCA, at minumum volume
  • Maximum Output Voltage:400Vr.m.s (1130Vp-p)
  • Gain:59dB
  • Harmonic distortion:0.025% or less/1kHz-10kHz /When use with SR-L series
  • Input Impedance:20kΩ (RCA)
  • Bias Voltage:DC580V
  • Mains voltage:AC100-240V 50Hz/60Hz (depending on your country’s voltage)
  • Power Consumption:35W
  • Operating temperature: 0 to 35 degrees C less than 90% humidity,non condensing)
  • Dimension:192(W)×67(H)×268(D) mm
  • Weight:4.5kg
  • Digital Input:USB(type B)×1、TOS×1、COAX×1
  • Analog input:RCA×1

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