National EAS-30L100
¥ 20,000 (1 unit, around 1987)
Commentary
A 30 cm cone type woofer unit that uses a linear damper.
The linear damper has a special structure in which vertically symmetric gathers are arranged on four sides of the voice coil, so that it is resistant to bending and twisting, fully suppresses rolling, and achieves excellent power linearity.
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Model Rating
| Type | 30 cm cone type woofer unit |
| Impedance | 8 Ω |
| Fo (lowest resonance frequency) | 30Hz |
| Frequency characteristic | Fo ~ 5 kHz |
| Output sound pressure level | 95dB/W/m |
| Input (Max) | 120W |
| Magnetic flux density | 10,000gauss |
| Total flux | 300,000maxwell |
| Cone Effective Radius | 130mm |
| Mo (equivalent mass) | 53g |
| Qo | 0.44 |
| Weight | 5.7kg |