Technics SB-3003 (c. 1974)
The Technics SB-3003 is a floor-standing, bass-reflex 2-way speaker system from about 1974, originally priced at ¥23,200 per unit. Documentation on this model is thin - no production years, owner impressions, or repair notes have surfaced in the sources examined. What the record does show is a straightforward, well-specified early-1970s Technics design:
- 2-way, 2-speaker bass-reflex system, floor type
- Low band: 20cm cone; high band: 6.5cm cone
- Frequency range: 50 Hz – 20 kHz; crossover at 2 kHz
- Impedance: 8 Ω; output sound pressure level: 94 dB/W/m
- Max input: 30W
- Dimensions: 329 × 653 × 230 mm; weight: 12 kg
- Walnut wood-grain finish
The engineering notes that survive are brief. The SB-3003 used a long-travel voice coil and a heat-resistant voice coil, both aimed at high input tolerance and power handling. Add the 94 dB/W/m sensitivity and it looks like a speaker built to play efficiently and take some punishment. No lineup context, no period reviews, and no further specifications have been found.
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