Holding this audio demonstration at the Shunyi Mall in Shenzhen was extremely challenging. Never before had I tried such a spacious environment, requiring significantly more power than usual to generate sufficient sound pressure. This put the stability and driving force of the Octave Jubilee equipment to the test. The system delivered a bright and cheerful sound, yet retained the unique charm of vacuum tubes. Its unwavering sonic accuracy was enough to captivate the hearts of vacuum tube audiophiles.