Sun 833X is possible to be flexibly adjusted the bias to optimize the sound for each system

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Advantages of engineering solution for the 833 tubes
– The 833 tubes operating in Class A – Single Ended 155W bring outstanding power to all speakers driven by the SUN-833X. The generous power output capability of the Sun-833X gives it an ability to amplify signals with extreme resolution and control. This is the gorgeous result in enhancing the enjoyment of music to an unprecedented level that our new amplifier generation has achieved. In the field of amplifiers, the Class A is the most excellent amplifier circuit for the best sound and 155W Class A is the most powerful output power for tube amps. For Audiophiles, Class A circuitry is the pinnacle of perfection! Sine signal without radial distortion at maximum output power provides an ultimate sound for listeners.

– Using Interstage transformers in the connection between 6H13C and the 833 tubes provides the best detail and delicateness to the high frequency while the bass gets lower, fuller and warmer compared to using cascading capacitors.

– Do not use feedback to keep the details of the sound and the emotions in music expressed in the most complete, natural and elegant way. Zero feedback is a key technical solution of ThivanLabs tube amplifiers to get the high fidelity sound.

– Using a completely toroidal power transformer for both power stage and driver stage is also an effective solution to reduce the noise. Power supply for high voltage 833 tubes, 833 filament and driver stage are separated and provided by separate toroidal transformers for excellent noise reduction.

– The power source filter for the 833 tubes uses 22 Oil capacitors and extremely large Chokes to provide abundant energy for the tubes to get a clean and detailed sound. Whereby, the sound power will show up very well in the climax of the music.

– Bias for the 833 can be adjusted (200-280mA) by two variable resistors on the driver block.
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*** For the system in the video, the bias for the 833 tubes was set at 280 - 285mA to optimize the sound for all types of music.

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