STAX SRM-700T

The SRM-700T is a high-efficiency electrostatic headphone amplifier with a “6SN7” GT vacuum tube. The GT tube is used in the second stage of the vacuum tube system, while a custom low-noise dual FET is used in the first stage. The 6SN7 vacuum tube, which became the original form of the 6FQ7, delivers simple and powerful performance. The hybrid driver uses high-quality non-inductive winding resistors from VISHAY Co. as load resistors. The clear and elevated sound of the vacuum tube has been enhanced to refine the warm and spacious reproduction.

• OTL (Output Transformer-Less) output stage with 2 6SN7 dual triodes.
• Symmetrical signal circuit construction.
• Volume/balance control switchable via an electrically shielded four-way potentiometer.

Measurements

• Frequency response: DC - 100 kHz (with an SR-009S)
• Gain: 60 dB
• Harmonic distortion: 0.01% or less (1 kHz/100 Vrms output)
• Input impedance: 50kΩ (RCA), 50kΩx 2 (XLR)
• Maximum output voltage: 340 Vrms (1 kHz)
• Bias voltage: PRO 580V

Connectivity

• 1 switchable input on the connection panel. Either balanced (3-pin XLR connectors) or unbalanced (RCA/phono jacks)
• 1 unbalanced output (RCA/phono jacks)
• 2 headphone outputs

General

• Power consumption: 54 W
• Dimensions: 240 L x 103 H x 393 D mm (maximum protruding part included)
• Weight: 5.7 kg