Lo-D HS-90F
¥ 160,000 (1 unit, released in 1980)
Commentary
Based on the design method for high-fidelity reproduction established with HS-10000, this speaker system integrates the form of a flat speaker unit filled with foamed resin into a bookshelf system.
All models of woofer, mid-range and tweeter use a flat speaker unit filled with foamed resin.
Since the sound wave radiation surface is flat, it has flat frequency characteristics, little distortion, and eliminates muffled sound due to the hollow effect that cannot be avoided with the cone shape.
In addition, since the structure is composed of a highly rigid metal cone filled with plastic, there is little distortion at the time of Dainyu force and a wide dynamic range characteristic is secured.
A 30 cm flat woofer L-3005F is mounted in the low range.
The structure is a highly rigid metal cone filled with foamed resin, and the combination of ギャザードエッジ and ギャザードスパイダ with high amplitude, high compliance, and high self-resonant frequencies improves low sound reproduction.
In addition, Lordi actuators (low-distortion magnetic circuits) and large magnets with diameters of 140 mm are installed to achieve low distortion and flat impedance characteristics.
The mid-range is equipped with a 5 cm planar mid-range M-5001F.
For mid-range applications, a small-diameter 5 cm dome diaphragm is filled with foam resin to expand the range of piston-like vibration and achieve wide dispersion.
Like the woofer, it uses ギャザードエッジ and gathered spider to lower the fo and make the connection with the woofer smooth.
The H-2001F, a 2 cm flat tweeter, is mounted in the high range.
In the same way as the mid-range model, a dome-shaped diaphragm is filled with foamed resin.
For the baffle plate and back plate, we have adopted 3-layer structure particleboards 30 mm thick made of conifer mainly made of Karamatsu.
In addition, the exterior is finished to make the most of the wood grain.
Model Rating
| Method | 3-Way, 3-Speaker, Bass reflex system, Bookshelf Type |
| Units, etc. | For Low Band : 30 cm Flat Type (L-3005F) For Middle Area : 5 cm Flat Type (M-5001F) For High Range : 2 cm Flat Type (H-2001F) |
| Frequency characteristic | 30 Hz to 20000 Hz |
| Max Input | 140W (music signal peak) |
| Impedance | 8 Ω |
| Output sound pressure level | 89dB/W/m |
| Crossover frequency | 710 Hz, 3150 Hz |
| Enclosure internal volume | 85L |
| External dimensions | Width 450x Height 745x Depth 405 mm |
| Weight | 45kg |