CORAL CX-5

Commentary

A 3-way speaker system with a symmetrical design.

A 25 cm cone type woofer is installed in the low range.
The diaphragm of this unit is made of Puredi Alcorn paper with a two layer structure. This paper is made from Scandinavian pulp using a new time-lag system and has a special hardness treatment applied to the surface. It is strong and has optimum internal loss. In addition, by adopting a long voice coil, excellent linearity is obtained even at large amplitude.
Aluminum die-cast frame is used for the frame to prevent resonance.

A semi-hard type 5 cm dome type skoker is installed in the middle area.
The diaphragm of this unit is directly molded after double application of acoustic dump on the surface of the material. Thus, excellent weather resistance and aging resistance are obtained, and at the same time, the merits of soft dome and hard dome are compatible.
The voice coil adopts a metal bobbin system that shows excellent propagation characteristics, and by winding the CCAW, the vibration transmission ability from the voice coil to the diaphragm is greatly improved.

A 1.7 cm hard dome type tweeter is installed in the high range.
An aluminum dyne diaphragm with a Aluminum metallized based on a polymer material of 70 μ m thick is used for the diaphragm. Combined with the CCAW voice coil, it realizes high efficiency and excellent transient characteristics.
A newly developed protective equalizer is used on the front of the diaphragm to provide excellent physical characteristics against diffraction and reflection of sound waves and sound quality without phase interference.

A new circuit (Pat. P.) with excellent phase and transient characteristics is adopted in the network section.
A choke coil with a large laminate core with high permeability is used for the woofer circuit, and high-grade MF capacitors for large current are used for the squaker and tweeter circuits to realize low distortion rate and low loss.

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

The enclosure uses a symmetrical design to improve orientation by arranging the units symmetrically.
In addition, high-density particleboards for acoustic equipment are used for the material, and reinforcement determined through comprehensive experiments on vibration phenomena and joining methods is applied. The inside is filled with three types of sound absorbing materials : Tetoron wool, ester wool blend cotton, and soft felt, which have different sound absorbing characteristics, and high sound absorbing effect is obtained over a wide range of frequencies.
The exterior uses a royal cherry natural wood veneer with a hard polyurethane finish.

Model Rating

Method	3-Way, 3-Speaker, Airtight Type, Bookshelf Type
Units Used	For low band : 25 cm cone type For Middle Area : 5 cm Dome Type For high-pass : 1.7 cm dome type
Playback frequency band	40 Hz to 25 kHz
Impedance	8 Ω
Program source input	60W
Crossover frequency	900 Hz, 7 kHz
Output sound pressure level	92dB/W/m
External dimensions	Width 325x Height 560x Depth 315 mm
Weight	15kg