Audio Database


This is a bookshelf type speaker system that uses a hard-dome unit developed in-house to support new generation sources such as PCM sources.

A 31 cm cone type woofer is installed in the low range.
For the cone paper, we have adopted a new manufacturing method of cone, which is a blend of Mitsumata and conifer of the Clupeidae family, and we have achieved a diaphragm with strong elasticity.
In addition, the voice coil uses a large-diameter edgewise winding made of copper ribbon wire to improve heat resistance and reduce distortion rate, while the magnetic circuit uses ferrite magnet.

A 9 cm hard dome type skoker is mounted in the middle area.
In order to achieve wide-band characteristics, we have completed and adopted a Mg-Cu added ultra-hard light alloy diaphragm using Coral's unique manufacturing method. This diaphragm achieves more than three times the hardness and shear strength of conventional super duralumin diaphragms.
The edge is impregnated with resins, coated with resins with different characteristics, and heat-treated tangential edges are used to obtain a braking effect and shape-retaining capability to bring out the characteristics of ultra-hard light alloy diaphragms.
In addition, the back cavity is filled with sound-absorbing material to ensure a low fo (280 Hz) for smooth connection with the woofer. In addition, a high-precision equalizer is installed in front of the diaphragm to improve directional characteristics, eliminate f-characteristic disturbances that occur outside the band, and improve the connection with the tweeter.
The voice coil uses an edgewise winding of aluminum wire with a large diameter of 70 mm φ, and the magnetic circuit uses a large ferrite magnet.

A 3.6 cm hard dome type tweeter is installed in the high range.
The diaphragm is made of super-hard alloy using a unique manufacturing method similar to the SCOKER. The edge is a tangential edge that is integrally molded with the diaphragm. This reduces unwanted resonance and improves transient characteristics.
In addition, a high-precision equalizer reduces interference distortion and improves directional characteristics.

To determine the constant of the network part, the optimum constant is adopted not only by checking electrical characteristics but also by cut-and-try with emphasis on hearing.
In addition, in order to demonstrate the transient response characteristics of each unit, metalized film capacitors are used for capacitors, and coils with laminated cores made of carefully selected magnetic materials are used for coils.
In addition, a 50-core cord is used for internal wiring.

The enclosure uses a specially designed high-density chip board for audio, and the resonance is controlled by reinforcing the important points.
In addition, the finish is a mahogany-style 4-side finish.

Model Rating
Method 3-Way, 3-Speaker, Bass reflex system, Bookshelf Type
Units Used For low band : 31 cm cone type
For Middle Area : 9 cm Dome Type
For high-pass : 3.6 cm dome type
Impedance 8 Ω
Program source input 120W
Instantaneous maximum input 240W
Playback frequency band 30 Hz to 30 kHz
Crossover frequency 470 Hz, 5 kHz
Output sound pressure level normal:94dB/W/m
Maximum sound pressure level 118dB
External dimensions Width 390x Height 710x Depth 350 mm
Weight 27kg