Leben Hi-Fi Stereo Company is a Japanese valve amplifier manufacturer. The designer and owner of Leben is Mr. Taku Hyodo, who is ranked as one of Japan's top eight valve audio design engineers. https://vimeo.com/1026544854?share=copy Mr. Hyodo is a highly experienced hi-fi engineer who worked for Luxman in the past and is also a proficient guitarist and plays a few different musical instruments (in fact, he was once a professional guitarist). All products are still manufactured in Japan, and owners of Leben products can expect a long service life and high reliability, as well as highly musical and rewarding performance. All Leben products are based on an "auto-bias circuit" (even sacrificing output power according to specifications) to allow users to replace tubes without bias adjustment and still operate stably.