Stax SRM-500T
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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.
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.

We have a comprehensive selection of Stax devices available for demonstration in our HiFi and headphone studios in Berlin-Kreuzberg. We look forward to your visit!
Model | Stax SRM-500T |
Type: | FET input + vacuum tube output hybrid DC amplification driver unit |
Vacuum tube: | 6FQ7/6CG7 |
Frequency response: | DC - 90kHz (with one SR-L500 MK2) |
Gain: | 60dB |
Harmonic distortion: | 0.01% or less (1kHz/100Vrms output) |
Input impedance: | 50kΩ (RCA), 50kΩx 2 (XLR) |
Maximum output voltage: | 300Vrms (1kHz) |
Bias voltage: | DC 580V |
Operating temperature / humidity: | 0 to 35 degrees C / less than 90% (non condensing) |
Input terminal: | RCA x 1, XLR x 1(mutual exclusion input) |
Output: | RCA parallel output |
Power consumption: | 38W |
Dimension: | 195 (W) x 102 (H) x 376 (D) mm (maximum protruding portion included) |
Weight: | 3.4kg |