Stax SRM-700S Electrostatic Headphone Amplifier

New semiconductor driver with J-FET in the amplification stage
All semiconductor driver unit that has adopted custom-made low-noise dual FET at the first stage, and for the first time in STAX driver unit history J-FET has been employed at the second stage. The output of J-FET excellent in low-noise amplification as well as large current emitter follower circuit brings out the full performance of earspeakers. Even the music source with much high-frequency ingredients can easily be driven. The driver unit pursues an exact reproduction of musical details.

• 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