SQ-38D
(1964 - 1965)

"Released in 1964, the original SQ-38D became so popular that at the time it was synonymous with hi-fi amps. 12AX7 and 12AU7 tubes are used in the first and driver stages respectively. Output tubes are 6BQ5 [6RA8 originally], while the power transformer is OY-14 type.
The number of inputs is increased to five to accomodate a greater number of sources available today, but the functions and basic design are the same as the original masterpiece."
(Luxman leaflet for the 1998 Japanese market reissue)

Does anyone know who designed the SQ-38D and its WZ-30 tuner companion?