STAX SRM-700S

STAX SRM-400S: High-End Semiconductor Amplifier for Audiophiles

The STAX SRM-400S is an advanced, fully semiconductor-based driver unit specifically designed for discerning audiophiles. This amplifier sets new standards in sound reproduction with its custom low-noise dual FETs in the first amplification stage and, for the first time in STAX's history, a J-FET in the second stage.

The use of a J-FET, renowned for its superior performance in low-noise amplification, ensures excellent high-frequency response and a clear, detailed sound signature. The large current emitter follower circuit fully unleashes the potential of the ear speakers, making it capable of driving music sources with high-frequency content effortlessly.

The SRM-400S is engineered to reproduce musical details precisely and authentically, providing an unparalleled listening experience for those who demand the highest quality sound.

Technical Specifications of the STAX SRM-400S

• Type: Fully configured FET-DC amplifier module
• Frequency Response: DC - 100 kHz (with an SR-009S)
• Gain: 60 dB
• Harmonic Distortion: 0.01% or less (at 1 kHz/100 Vrms output)
• Input Impedance: 50 kΩ (RCA), 50 kΩ x 2 (XLR)
• Maximum Output Voltage: 450 Vrms (at 1 kHz)
• Bias Voltage: PRO 580 V
• Operating Temperature/Humidity: 0 to 35 °C / less than 90% (non-condensing)
• Input Connections: RCA x 1, XLR x 1
• Output: RCA parallel output
• Power Consumption: 46 W
• Dimensions: 240 mm (W) x 103 mm (H) x 393 mm (D) (including maximum protruding parts)
• Weight: 6.3 kg

The SRM-400S is an exceptional choice for audiophiles seeking detailed, precise sound reproduction in a robust and modern design, delivering the quality that STAX is known for.