Stax SRM-700S


  • New semiconductor driver with J-FET in the amplification stage
  • The power transistor array with effective heat dissipation through large-sized heat sink
  • Strictly selected pair-matched special FET.
  • High-definition film capacitor made by German WIMA is used.
  • Level control switch that can bypass the volume of the unit.
  • As with SRM-T8000,a shield case is used for the volume device.
  • RCA and XLR inputs are switchable. RCA input supports parallel out.

Available on backorder





The SRM-700S is an electrostatic headphone driver utilizing a fully discrete dual FET. The output of the J-FET and the large current emitter follower circuit are low noise. Accurate music reproduction is realized without missing any fine details.

Low-noise dual FET

New semiconductor driver with J-FET in the amplification stage. The custom-made, low-noise dual FET is low-noise. The power transistor array with effective heat dissipation through a large-sized heat sink. Hand selected matching FET & High-definition film capacitors are used. Volume control is EMI shielded

Rear Panel

Switchable RCA and XLR inputs. RCA parallel out. Bypass volume control switch.

Aluminum Chassis

The newly developed large-sized aluminum insulator combined with new vibration-proof material and high frictional coefficient (grip power) have been employed.
Specifications SRM-700S
Type All-stage FET configuration DC amplification driver unit
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 450Vrms (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 46W
Dimension 240W x 103 H x 393 D mm (maximum protruding portion included)
Weight 6.3kg
Similar Product SRM-700T
Weight 2 kg
Dimensions 25 × 25 × 25 cm


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