Concert Fidelity is a company started in 1987 by Masataka Tsuda, who continues to design and build all of the products at our workshop in Tateshina Highland, NAGANO. (Japan)

Tateshina-Vil 15-147, Kitayama, Chino-shi,
Nagano-ken 391-0301, JAPAN
Phone: (+81) 266-78-8002 (10:00-17:00 Japan time)
E-Mail: biz-info(at)

Masataka Tsuda  

Founder, President and Designer

●Started to build vacuum tube amplifiers at age of 10
●Acquired Ham Radio license at age of 14 (JA0-TWU)
●Worked at his father’s precision machining and tooling company for 12 years
●Worked at a semiconductor trading firm for 6 years
●Worked at a precision measuring instrument trading firm for 3 years

Contact: m-tsuda(at)

Product Line