Lo-D HS-230
¥ 43,800 (1 unit, around 1980)
Commentary
A 3-way speaker system using a metal diaphragm developed by inheriting HS-630 and HS-430 technologies.
The low range is equipped with a 25 cm metal single plate cone type woofer L-2503.
Aluminum alloys with a thickness of 170 μ m are used for the diaphragm. In order to reduce the weight of the cone and prevent low-frequency asymmetric vibration, a cap-cone structure is adopted to increase the synthesis of the entire vibration body. This is achieved by the use of a ギャザードエッジ with high amplitude retention and high compliance characteristics at the edge.
The mid-range is equipped with 6.5 cm metal single plate cone type mid-range M-6504.
A single aluminum alloy plate of 6.5 cm is used for the diaphragm to expand the range of piston-like vibration and achieve wide dispersion.
In addition, high compliance free edge with excellent moisture resistance is adopted for the edge to lower fo and make the connection with the woofer smooth.
Heat-resistant voice coil is used for voice coil.
H-2504 of 2.5 cm metal dome tweeter is mounted in the high range.
High-hardness titanium diaphragm is used, and input resistance is improved by heat-resistant voice coil.
It is equipped with independent continuous variable level control for middle and high frequencies.
The enclosure has a mahogany finish and uses a bass reflex system.
Model Rating
| Method | 3-Way, 3-Speaker, Bass reflex system, Bookshelf Type |
| Units, etc. | For Low Band : 25 cm Cone Type (L-2503) For Middle Range : 6.5 cm Cone Type (M-6504) For High Range : 2.5 cm Dome Type (H-2504) |
| Frequency characteristic | 38 Hz ~ 20000 Hz (-15dB Anechoic Room) |
| Max Input | 100W (music signal peak) |
| Impedance | 6 Ω |
| Output sound pressure level | 92dB/W/m (8 Ω conversion) |
| Crossover frequency | 800 Hz, 4.5 kHz |
| Enclosure internal volume | 40L |
| External dimensions | Width 315x Height 575x Depth 335 mm |
| Weight | 13.5kg |