YAMAHA JA-0770
¥ 21,000 (1 piece, around 1980)
Commentary
A mid-range unit made by refining the soft dome Skoka of the NS 690 II series into a single unit.
Integrated molding for each tangential edge is adopted.
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Model Rating
| Type | Dome mid-range unit |
| Nominal impedance | 8 Ω |
| Playback frequency band | 300 Hz to 15 kHz |
| Recommended bandwidth | 700 Hz to 7 kHz |
| Rated input | 15W |
| Max Input | 30W |
| Output sound pressure level | 91dB/W ・ m |
| Diaphragm | Soft dome |
| Voice coil diameter | 52.7 φ mm |
| Magnet | Ferrite, 0.93 kg |
| Magnetic flux density | 13,500gauss |
| Total flux | 78,000maxwell |
| External dimensions | Diameter 160 mm x Height 112.1 mm |
| Weight | 3.0kg |