Lo-D HS-55
¥ 59,000 (1 unit, released in 1978)
Commentary
This 2-way speaker system was developed to ensure a wide dynamic range.
A 30 cm cone type woofer is installed in the low range.
The cone paper uses a new manufacturing method to ensure the required rigidity and appropriate internal loss. In addition, a deep corrugation increases the high resonance frequencies and smoothes the connection with the tweeter. The magnetic circuit is equipped with a 140 φ magnet and Lo-D actuators. In addition, a voice coil bobbin using a 4-layer thermosetting self-welding wire, an aluminum die-cast frame, a non-directional urethane foam edge, etc. improve input resistance and リニリティ.
A horn type tweeter equipped with an acoustic lens is installed in the high frequency range.
This unit uses a 235 mm Exponential Type Aluminum Die-cast Horn, and the opening is equipped with an acoustic lens that suppresses unwanted vibration by cushioning material to improve dispersion.
The diaphragm is equipped with a 3.5 cm titanium dome, the magnetic circuit is equipped with a 90 mm φ magnet, a high density zinc die-cast multi-hole equalizer, roll edge, hard aluminum bobbin, etc.
Equipped with continuously variable level control for high frequency band.
The baffle plate and back plate are made of three layer particleboards made of coniferous trees mainly made of Karamatsu. In addition, effective reinforcement and high-quality sound absorbing material are used to suppress box rumbling.
Model Rating
Method | 2-Way, 2-Speaker, Bass Reflex System, Bookshelf Type |
Units, etc. | For low band : 30 cm cone type For High Frequency : Horn Type |
Frequency characteristic | 40 Hz ~ 20000 Hz (-15dB Anechoic Room) |
Max Input | 200W (music signal peak) |
Impedance | 8 Ω |
Output sound pressure level | 94dB/W/m |
Maximum output sound pressure level | 117dB/m |
Crossover frequency | 1.5kHz |
Enclosure internal volume | 62L |
External dimensions | Width 370x Height 665x Depth 410 mm |
Weight | 24.5kg |