Stax SRM-T8000


  • Low-noise, well-established 6922 dual triode tube adopted for high sound quality
  • Balanced inputs realizing true tone quality of balanced transmission.
  • Coupling capacitor-free configuration from input to output.
  • Compatible with all STAX PRO-bias earspeakers with 5-pin plug
  • Various high-grade electronic parts

Available on backorder




SRM-T8000 is Stax’s latest flagship electrostatic headphone amplifier utilizing hybrid technology. It employs two 6922 in the input stage, driving a Class-A solid-state output stage. The vacuum tubes isolated in a separate section made of a vibration-proof damper and shield cover to eliminate vibration and noise. The high-capacity large toroidal transformers and selected high-quality parts allow the highest refinement in sound.

6922 dual triode tube

The noise level is extremely low and, by just that much, the particle of low-level sound usually buried in noise comes up to the surface. Then even the usual level sound clears up to improve sound quality such as transparency. It seems as if the glass which superficially looks transparent has been cleaned anew. The whole circuit forms a hybrid one using class-A semiconductor output stage with large current emitter follower. The result is very low noise, live and smooth musical sound as well as excellent spatial description. The vacuum tube of the first stage is mounted on an independent board in order to eliminate vibration and external noise. Further, noises have been excluded thoroughly by vibration-proof damper and vacuum tube shield cover used also for a hard disk etc.

Rear Panel

Four pairs of inputs are equipped. (Notes: LINE4 is an optional circuit board slot for future purpose. As for now, release is not yet determined.). LINE1, LINE2 or LINE3 inputs of the SRM-T8000 can bypass the incorporated volume controller, enabling it to connect to source equipments with volume controller or to an external attenuator. That is, the unit can be used as an exclusive power amplifier with no volume controller. Balanced inputs realizing true tone quality of balanced transmission.

Aluminum Chassis

Newly developed large-sized aluminum insulator combined with new vibration-proof material and high frictional coefficient (grip power) has been employed. The friction power is so high that you almost need not hold the unit when inserting the plug of your earspeaker.
Specifications SRM-T8000
Frequency response 1Hz – 115kHz / when used with one earspeaker
Gain 60dB (x1000)
Harmonic distortion 0.01% /1kHz
Input terminal LINE1/LINE2 (RCA), LINE3 (XLR), LINE4 (optional input for future)
Rated input level 100mV (at 100V output)
Input impedance 50kΩ (RCA) / 50kΩx 2 (XLR)
Maximum output voltage 470Vrms (1330V p-p)
Mains voltage AC120V/AC220/AC230/AC240, 50/60Hz (depending on your country’s voltage)
Power consumption 95W
Operating temperature 0 to 35 degrees C (less than 90% humidity, non condensing)
Dimension 320 (W) x103 (H) x395 (D) mm (protruding portion included)
Weight 7.3kg
Similar Product SRM-700S
Weight 8 kg
Dimensions 25 × 25 × 25 cm


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