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STAX SRM-700T Driver Unit For Electrostatic Earspeakers

"6SN7" GT tube has been adopted in the second stage of the vacuum tube system, while custom-made low-noise dual FET is employed in the first stage. The vacuum tube 6SN7 that has become the original form of 6FQ7 realizes simple and powerful performance. The hybrid type driver has adopted the high-quality non-inductive winding resistor from VISHAY Co. as a load resistance. The clear and high slew-rate vacuum tube sound has been improved further to polish up warm and spacious reproduction.


  • TypeFET input + vacuum tube output hybrid DC amplification driver unit  
  • Vacuum tube6SN7
  • Frequency responseDC - 100kHz (with one SR-009S)
  • Gain60dB
  • Harmonic distortion0.01% or less (1kHz/100Vrms output)
  • Input impedance50kΩ (RCA), 50kΩx 2 (XLR)
  • Maximum output voltage340Vrms (1kHz)
  • Bias voltagePRO 580V
  • Operating temperature / humidity0 to 35 degrees C / less than 90% (non condensing)
  • Input terminalRCA x 1, XLR x 1
  • OutputRCA parallel output terminal
  • Power consumption54W
  • Dimension240W x 103H x 393D mm (maximum protruding portion included) 
  • Weight5.7kg

Backed with a 1-year STAX warranty

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