Stax SRM-500T


  • FET Input + vacuum tube output hybrid DC amplification
  • Newly Designed Vacuum Tube Output Stage
  • Custom-Made Low Noise Dual FETs
  • Pair of 6FQ7/6CG7 pre-installed Vacuum Tubes
  • Pair of RCA input terminals
  • Pair of XLR 3-pin input terminals
  • RCA parallel output terminals

Available on backorder

stax srm-500t

stax srm-500t Stax introduces a new model SRM-500T to replace its successor of SRM-006tS. The SRM-500T utilizes a pair of 6FQ7/6CG7 vacuum tubes as the output, driven by custom-made low noise dual FET. Stax pride itself in offering a great value electrostatic driver at the best possible performance
stax srm-500t

Newly Designed

The newly designed power transformer enables power efficiency. As a result, it achieves an improved sound quality than the conventional vacuum tube output driver unit found in SRM-006tS.
stax srm-500t

Low Voltage Winding

In addition to the conventional power transformer for the high voltage circuit, the newly designed power transformer with the winding for the low voltage circuit is installed in SRM-500T. The low voltage winding enables to improve the power efficiency and achieve further power saving and better sound quality than the conventional vacuum tube output driver units such as SRM-006tS.
stax srm-500t

Non-magnetic Aluminum Chassis

The new chassis which is more rigid than the conventional model is installed. The chassis has a hybrid structure using a lot of non-magnetic aluminum and further reduces the effect of the environmental noise factors such as vibrations. The inputs are RCA and XLR, the mutual exclusion inputs. The custom made concentric dual volume knob which is common to STAX products and RCA PARALLEL OUT functions are installed same as the conventional driver units. All electric components are strictly selected considering the environment. Also the sound quality and the performance is improved. The complete DC amplifier configuration that the signal circuit includes no coupling condensers is one of the biggest traditional features. The clear and highly transparent sound, a feature of the vacuum tube circuit and the warm and wide sound texture is maintained and the thickness of the low-mid range is brushed up.
SpecificationSTAX SRM-500T
TypeFET input + vacuum tube output hybrid DC amplification driver unit
Vacuum tube6FQ7/6CG7
Frequency responseDC – 90kHz (with one SR-L500 MK2)
Harmonic distortion0.01% or less (1kHz/100Vrms output)
Input impedance50kΩ (RCA), 50kΩx 2 (XLR)
Maximum output voltage300Vrms (1kHz)
Bias voltageDC 580V
Operating temperature / humidity0 to 35 degrees C / less than 90% (non condensing)
Input terminalRCA x 1, XLR x 1(mutual exclusion input)
OutputRCA parallel output
Power consumption38W
Dimension195 (W) x 102 (H) x 376 (D) mm (maximum protruding portion included)
Similar ProductSRM-400S
Weight 2 kg
Dimensions 25 × 25 × 25 cm


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