DIATONE TW-25
¥ 10,500 (1 piece, around 1970)
¥ 49,000 (1 piece, around 1991)
Commentary
The tweeter unit used in the 2S 305 monitor speaker.
A small curved cone with an effective radius of 2 cm is used in the cone section. The magnetic circuit that drives this vibration system is made of iron-cobalt and vanadium alloys, and is as strong as 18000 Gauss. This realizes a wide range of 1500 Hz to 35000 Hz.
In addition, it has excellent directional characteristics, such as -3dB at 30 ° and -6dB at 60 ° at 15 kHz.
Model Rating
| Method | Cone type tweeter unit |
| Aperture | 5cm |
| Impedance | 13 Ω |
| Rated input | 20W Simple Continuous : 3W |
| Low resonance frequency | 1500Hz |
| Playback frequency band | 1500 Hz to 16000 Hz |
| Output sound pressure level | 102dB/W (at 50 cm) |
| Effective vibration radius | 2.0cm |
| Equivalent mass of the vibration system | 0.37gr |
| Voice Coil Diameter | 1.6 cm φ |
| Magnetic flux density | 18000gauss |
| Total flux | 11.5x104maxwells |
| Permanent magnet | 30 φ x30 |
| Baffle opening diameter | 81mm |
| Outer Diameter Dimension | Diameter 102x Depth 70.5 mm |
| Weight | 1.1kg |