DIATONE PW-201
¥ 6,000 (1 piece, around 1970)
¥ 21,000 (1 piece, around 1991)
Commentary
A 20 cm cone type woofer unit used in the 2S 208.
In addition to preventing low-frequency distortion by using reverse-curved cone paper, we have designed Qo to be 0.5 so that it can be mounted in a phase inversion cabinet and exhibits its true potential. We take special consideration for distortion.
Model Rating
| Method | Cone type woofer unit |
| Aperture | 20cm |
| Impedance | 16 Ω |
| Rated input | 10W |
| Low resonance frequency | 60Hz |
| Playback frequency band | 60 Hz to 2000 Hz |
| Output sound pressure level | 100dB/VA (at 50 cm) |
| Effective vibration radius | 7.8cm |
| Equivalent mass of the vibration system | 12gr |
| Equivalent Qo of the vibration system | 0.5 |
| Voice Coil Diameter | 3.6 cm φ |
| Magnetic flux density | 9000gauss |
| Total flux | 15x104maxwells |
| Permanent magnet | 40 φ x35 |
| Baffle opening diameter | 180mm |
| Outer Diameter Dimension | Diameter 202.4x Depth 123 mm |
| Weight | 1.8kg |