CORAL CX-77 (1976) | High Linear Sound

CORAL CX-77, Naturally beautiful, High Linear Sound from 1976. Proper balance among tweeter, squawker, and woofer is crucial when assembling a good speaker system. Cone paper, the heart of the woofer, must possess high Young's modulus and be fully flexible. The woofer in the CX-77 speaker system features Coral's own specially developed micro-crystal cone paper, the surface of which is coated with fine hollow crystal grains 0.1mm in diameter and with a specific gravity of 0.3. Thus partial vibration has been greatly enhanced, refining the transient characteristics of the lower and bass ranges. The rest of it, too the free edge with full linearity, diecasting frame absolutely without resonance, powerful magnetic circuit help all contribute to some of the richest, most listenable low frequency sounds available. The tweeter flawlessly reproduce the delicate high-range sound properties of every musical instrument. Coral's is a hard dome-type super-tweeter that uses a diaphragm of 18-micron-thick ultra-thin Super Duralmin having a crossover frequency of 7,000Hz. The expanded high-range frequency response of 40,000Hz easily reproduces everything within the normal audible frequency of 20,000Hz with outstanding directivity. The sound quality is amazing. There is also an attenuator that enables continuous variation of the mid- and high-frequency ranges independently. The x-over network is a Low-loss design employing a Mylar film capacitor and a coil featuring a high permeability reluctance ferrite core, which refuses to cause linear distortion even under large input. The design brings out the maximum transient characteristics of each speaker. CORAL, having developed its own exclusive method for molding highly rigid titanium speaker domes, is now able to provide the audiophile with the most superb mid-range speakers ever. The voice coil in these speakers features CCAW winding and flawlessly maintains optimum balance of mass, extending the high range limit and largely improving transient characteristics. The aluminum bobbin boasts large input resistivity, and a spacious back cavity easily expands the frequency response of the lower range to efficiently cover everything from 700Hz to 7,000Hz. Clear, faithful sound. What more could one ask? The higher the performance of the speakers, the more important the quality of their enclosure becomes. The CX-77 system uses a bass-reflex enclosure, which features a highly condensed multi-layer particle board, eliminating unwanted vibration. The side, baffle and back boards are strongly reinforced. The speakers are symmetrically mounted to achieve optimum directivity. Beautifully finished with UVD coating, the CX-77 system enclosure symbolizes the perfection of the system.

SPECIFICATIONS

Enclosure: Bass-reflex type 

Speakers: 30cm woofer, 5cm titanium dome squawker, 2cm hard dome tweeter

Frequency response: 30-40,000Hz

Crossover frequency 700Hz, 7,000Hz

Output sound pressure level. 94dB

Program source input......... 80W

Impedance. 8 Ohms

Dimensions 390mm(W) x 650mm(H) x 320mm(D)

Weight 22kg

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