The first all-tube amplifier with a single-ended 300BH triode utilizing an ultra linear circuit, and the characteristic sound of a true Class A amplifier. The 300 BH Triode was specifically developed for this amplifier. Even though it stems from our 300B triode, its characteristics have been altered so the sound is more "guitar-like". The original 300B triode is very linear and too "Hifi-Like" or analytic for this purpose. This is why JJ researched and developed a Triode electron tube specifically to complement the guitar. The sound JJ have achieved in the ONE is different from what is produced with the triode connected pentode commonly used today.
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