"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.



  • Type: FET input + vacuum tube output hybrid DC amplification driver unit Vacuum tube: 6SN7
  • Frequency response: DC - 100kHz (with one SR-009S)
  • Gain: 60dB
  • Harmonic distortion: 0.01% or less (1kHz/100Vrms output)
  • Input impedance: 50kΩ (RCA), 50kΩx 2 (XLR)
  • Maximum output voltage: 340Vrms (1kHz)
  • Bias voltage: PRO 580V
  • Operating temperature / humidity: 0 to 35 degrees C / less than 90% (non condensing)
  • Input terminal: RCA x 1, XLR x 1
  • Output: RCA parallel output terminal
  • Power consumption: 54W
  • Dimension: 240 (W) x 103 (H) x 393 (D) mm (maximum protruding portion included)
  • Weight: 5.7kg

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