Technics SB-105 (1977)

Not much is documented about the Technics SB-105. What survives points to a substantial late-1970s two-way. It was listed around 1977 at ¥21,800 per speaker, and the finish on the one known period example suggests it was made in Japan. Technics rated it as a bookshelf-type, two-driver system.

The drivers are simple: a 25 cm cone woofer for the low band and a 6 cm cone tweeter above it. Impedance is 8 Ω, maximum input is 50W, and rated output sound pressure level is a fairly sensitive 93 dB/W/m. One design detail survives in the database entry. Technics raised the woofer's position in the cabinet to suppress floor reflections and reproduce cleaner low frequencies. The cabinet is no lightweight - 350 mm wide, 630 mm high, 324 mm deep, and 13.5 kg per speaker.

After that the paper trail thins out. No frequency response, crossover frequency, or cabinet construction details are recorded, and no production run length is known. A Russian resale listing calls the pair rare, states it comes from a personal collection, and asks 49,000 rubles - but that is a single asking price, not a market reference.

Type: 2-way, 2-driver bookshelf speaker
Low band: 25 cm cone woofer / High band: 6 cm cone tweeter
Impedance: 8 Ω
Max input: 50W
Output sound pressure level: 93 dB/W/m
Dimensions: 350 × 630 × 324 mm (W × H × D)
Weight: 13.5 kg
Reference price: ¥21,800 per unit (c. 1977)