Lo-D HS-630

Commentary

This 3-way speaker system uses metal diaphragms for all units.
Based on the theme of high efficiency and wide dispersion, the completeness is improved by the repetition of elaborate calculation, experiment and audition.

A 30 cm metal cone type woofer (L-3003) is mounted in the low range.
The cone section uses a metal cone with features such as a piston-like vibration band expanding by approximately one octave (twice) in the high-frequency direction, little degradation of sound quality due to changes in humidity, and stable quality. Aluminum alloy with a thickness of 200 μ m is used for metering, while a cap-cone structure increases the rigidity of the entire diaphragm in order to prevent asymmetric vibration in the low-frequency range.
In addition, a unique V-shaped ギャザードエッジ has been adopted in the edge section to improve the mechanical straightness of the piston vibration of the diaphragm, reduce the distortion at large amplitude and edge resonance distortion, and successfully lower the lowest resonance frequencies.

The mid-range is equipped with 5.5 cm metal single plate cone type mid-range (M-5501).
As with the woofer, it is made of aluminum alloys. The edge has a ギャザードエッジ with an amplitude of ± 2 mm. Combined with the back cavity, the lowest resonance frequencies are lowered to 280 Hz.

A 2.2 cm aluminum alloy dome type tweeter (H-2201) is mounted in the high range.

Each unit uses an aluminum die-cast frame.

The baffle plate and back plate of the enclosure are made of three layered particleboards made of conifer trees mainly made of karamatsu.

It is equipped with continuously variable level control for middle and high frequencies.

Model Rating

Method	3-Way, 3-Speaker, Bass reflex system, Bookshelf Type
Units, etc.	For Low Band : 30 cm Cone Type (L-3003) For Middle Range : 5.5 cm Cone Type (M-5501) For High Range : 2.2 cm Dome Type (H-2201)
Frequency characteristic	30 Hz ~ 20000 Hz (-15dB Anechoic Room)
Max Input	140W (music signal peak)
Impedance	6 Ω
Output sound pressure level	92dB/W/m (8 Ω conversion)
Crossover frequency	700 Hz, 4 kHz
Enclosure internal volume	70L
External dimensions	Width 400x Height 710x Depth 380 mm
Weight	25kg