Technics EAS-25PL20NA/NB
¥ 12,500 (1 unit, around 1966)
Commentary
25 cm cone shaped woofer unit.
Thick cone paper is used to reduce the strain from the diaphragm itself.
The voice coil winding width is designed to be 2.5 times the plate width to prevent the voice coil from flying out of the magnetic field at large amplitude.
In addition, the linearity of the support type is improved by the adoption of UL edge.
A large 540g magnet is used for the magnetic circuit.
The difference between EAS-25PL20NA and EAS-25PL20NB is that the V. C impedance is 8 Ω for NA and 16 Ω for NB.
.JPG)
Model Rating
| Type | 25 cm Cone Woofer |
| Allowable input | 30W |
| V. C impedance | 8 Ω (EAS-25PL20NA) 16 Ω (EAS-25PL20NB) |
| Playback frequency | 20 Hz to 3 kHz |
| Lowest resonance frequency | 22 Hz to 28 Hz |
| Output sound pressure level | 98dB |
| Cone effective diameter | 200mm |
| Magnetic flux density | 10,000gauss |
| Total flux | 170,000maxwell |
| Weight | 4.5kg |