STAX SRM-700S

Unmatched build quality

STAX is renowned for its refusal to compromise on quality. Since its founding in 1928, the company has insisted that all products bearing the STAX name be manufactured entirely in Japan. This nationalistic philosophy ensures superior craftsmanship and meticulous attention to detail. The SRM-700S is no exception to this rule, offering solid and reliable construction.

Exceptional sound performance

The SRM-700S uses high-quality semiconductor components to deliver exceptional sound performance. With high amplification and very low noise, this headphone amplifier offers an extended dynamic range, allowing for accurate reproduction of the most delicate musical passages. You will be amazed by the clarity and precision of the sound produced by the SRM-700S.

Advanced technology

The SRM-700S is the first STAX product to use a particular semiconductor device called J-FET in its second stage. This cutting-edge technology, combined with a high-current emitter-follower circuit, ensures optimal performance for electrostatic headphones, even those with complex impedance curves in the high frequencies. With an impedance of 50 kohms (RCA) and a gain of 60 dB, the SRM-700S is designed to provide a frequency response from DC to 100 kHz, offering detailed and accurate sound reproduction.

Technical Specifications

Electronic Architecture

• Transistor output stage without feedback, with very low-noise junction field-effect transistor (JFET)
• Symmetrical signal circuit architecture
• Switchable volume and balance control via four-way shielded potentiometer

Technical Specifications

• Bandwidth: DC - 100 kHz (with SR-009S)
• Gain: 60 dB
• Harmonic distortion: ≤ 0.01% (at 1 kHz, 100 V RMS output)
• Input impedance: 50 kΩ (RCA), 2 × 50 kΩ (XLR)
• Maximum output voltage: 450 V RMS (1 kHz)
• Bias voltage: PRO 580 V

Connectivity

• 1 switchable input:
  • Balanced (3-pin XLR)
  • Unbalanced (RCA)
• 1 unbalanced output (RCA)
• 2 headphone outputs

Physical Characteristics

• Power consumption: 46 W
• Dimensions (W × H × D): 240 × 103 × 393 mm (depth with knobs and connectors)
• Weight: 6.3 kg