Lo-D H-54HD
¥ 3,500 (1 unit, around 1973)
¥ 4,500 (1 unit, around 1974)
Commentary
This horn-type tweeter unit is mass-produced without deteriorating the characteristics of the H-70HD.
By taking into consideration the clamp of the diaphragm and suppressing the non-linear movement of the vibration system, the distortion is reduced.
To improve the heat resistance of the voice coil, we use carefully selected heat-resistant materials.
In addition, a special lightweight wire is used for the voice coil to lighten the vibration system.
The diffusion effect is improved by adopting an acoustic lens with a special shape.
This acoustic lens is designed with an entrance to exit ratio of 10 : 7 and a thickness of 15 mm.
Die-cast is used for the horn part.
Model Rating
Format | Horn type tweeter |
Aperture diameter | 5.42cm |
Baffle hole | 5.8cm |
Voice Coil Diameter | 1.4cm |
Rated input | 8W (with designated network) |
Output sound pressure level | 101dB/W/m |
Voice coil impedance | 8 Ω |
Playback frequency band | 2 kHz to 20 kHz |
Cutoff frequency | 2kHz |
Crossover frequency | 4 kHz or more |
Total flux | 33,000maxwell |
Magnetic flux density | 11,500gauss |
Depth | 8.45cm |
Weight | 0.57kg |
Attachment | Acoustic lens |