Technics SB-1870 (c. 1978)
The SB-1870 is a floor-standing, 3-way, 3-speaker bass reflex system from Technics' late-1970s lineup. The ¥44,800 per-speaker price is typically dated to around 1978. Documentation on this model is thin. The surviving record is mostly a spec-sheet entry with no confirmed production years, no owner commentary, and no period reviews.
It was a linear phase design, Technics' term of the era for aligning the arrival of each driver's output at the listening position. The low and mid bands both used cone drivers. The high-frequency driver type is undocumented. Frequency response, crossover points, impedance and driver sizes haven't surfaced either.
Known specifications:
- Type: 3-way, 3-speaker bass reflex, floor-standing
- Output sound pressure level: 91.0 dB/W/m
- Max input: 70W (100W music)
- Dimensions: 420 × 803 × 337 mm (W×H×D)
- Weight: 19.0 kg
- Original price: ¥44,800 per speaker (c. 1978)
If you own a pair or have a brochure stashed away, the gaps here are real ones — driver complement, crossover details, and actual production span are all waiting to be documented.
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