CORAL 12L-50
¥ 13,000 (1 unit, around 1965)
Commentary
30 cm cone type woofer unit of Coral L50 series (Pervection series).
The L50 series uses a skybar edge to achieve low fo.
Alnico system magnet is used for the magnetic circuit, and low fo is realized by combining with long travel voice coil.
It seems that it was 16 Ω around 1965, but 8 Ω was sold around 1970 which is the latter period.
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Model Rating
| Method | 30 cm cone type woofer unit |
| Playback frequency band | Fo ~ 2.5 kHz |
| fo | 17 Hz to 34 Hz |
| Sound pressure level | 100dB |
| Input | 30W |
| Impedance | 16 Ω (Initial) 8 Ω (Later Stage) |
| Effective mass of vibration system | 46g |
| Qo | 0.47 |
| Total flux | 170,000maxwell |
| Weight | 7.0kg |