Jubilee 300 B

The Jubilee 300 B single-ended monoblocks represent the pinnacle of high-end audio amplification, utilizing the venerable 300 B tube in a novel and powerful design. Aimed at achieving a perfect blend of power and sonic purity, the design philosophy was not to chase power alone but to create an environment that would bring out the best in the 300 B tube. The innovative concept involves a single-ended amplifier delivering 20-30 W output power through the use of three power tubes in indirect parallel operation, addressing and overcoming the inherent challenges in directly heating the triodes.

One of the key challenges with directly heated triodes is the inability to operate them in parallel due to the heating demands that increase with output power. The typical solution employing 50 Hz AC heater voltages introduces unacceptable levels of hum and noise. Octave’s ingenious solution involves a custom-developed 7 Hz power generator that supplies each tube with a separate, regulated 7 Hz pure sine wave heating voltage. This setup not only allows multiple 300 B tubes to operate in parallel but also eliminates the ripple and RF disturbances typical of line frequency heating. The precise control over the heating and operating voltages ensures stability and lets the tubes achieve their full sonic potential, making clear why the 300 B is often regarded as the "queen" of tubes.

The Jubilee 300 B thus stands out as a modern, uncompromised implementation of one of the finest amplification technologies available, delivering an emotive, smooth, and dynamic triode sound across the entire audio spectrum. It showcases a breadth of technical innovations such as the use of zero feedback technology, advanced power management with soft-start electronics, and a sophisticated protection system. Additionally, the amp includes BIAS setting and display for optimal operation.

For those looking to enhance their audio experience further, the Jubilee 300 B offers options like the bi-amping package, allowing for further customization and optimization according to listener preferences and system requirements. The construction also offers choices in aesthetics, including different wood materials and color finishes for the middle section, ensuring the amplifier not only sounds exceptional but also complements its environment perfectly.