Not just a further development but a brand-new development on the theme of valve prestages is how the SA-31MK is presented. Two additional 6N16 valves in the output stage, redesign of the voltage control, electronic volume and input control make a clear statement which is expressed 100% in the sound.
Frequency response: 20 Hz - 50 kHz +/- 0.5 dB,
Output voltage: 2 V,
Total harmonic distortion: < 0.1 % (1 kHz, 1 Watt),