Description The speaker system which attained a high rigidity and absent-resonance-ization further based on D-77X.
The 31cm cone type Woofer by a pure cross carbon diaphragm is carried in low-pass. This diaphragm cone-ized the carbon fiber with the fiber type, and the high purity and the high rigidity are realized by not mixing other materials which are inferior in respect of a property. Moreover, the construction of a diaphragm has adopted the two-layer type of a carbon sheet, gives and piles up the angle of 45 degrees mutually, and is raising the intensity of the omnidirectional. Furthermore, in order to cancel a vibration, with the rigidity of a diaphragm maintained, it is molding into the special-shaped carved cone. Moreover, the magnet of size phi140xphi75x17tmm, flux density 11,700gauss, and the total magnetic-flux 155,000maxwell is used for a magnetic circuit, and the engineering elastomer with little property transition on an edge by a temperature and humidity is adopted as it. Furthermore, the acoustic stabilizer which is a heavyweight wait is carried in the under plate part of a Woofer, and the unnecessary oscillation is decreased.
The 12cm cone type squawker by pure cross carbon is carried in the mid range. For the aperture of 12cm, the carbon fiber sheet minuter than a Woofer and lightweight type is used for a diaphragm with a two-layer structure, it introduces the newly developed special high molecular compound into the binding material of cone molding, and is attaining the weight saving more. Furthermore, the original oscillating dissolution technology is supplied and the structure with two angles, 25 degrees/55 ", is adopted paying attention to distributing and canceling the peek of a high region vibration by transition (the shallowness/depth of a cone) of the half-vertical angle of a cone. The engineering elastomer is adopted as an edge like a Woofer.
The 2.5cm dome shape tweeter which used plasma carbonite titanium is carried in the high region. This plasma carbonite titanium is what performed the hard facing treatment by the plasma method in the base-material part of titanium, made ceramics-ized titanium and the carbonite layer of the high hardness form, and has obtained the hardness of 5.6 times of pure titanium. Since the boundary (interface) of a hardening layer and a pure titanium part does not exist by stiffening the base material itself unlike the processing method coated on the top layer of titanium with this common plasma process, the endurance and the robustness are improved. Furthermore, in order to attain absent-resonance-ization of a diaphragm, the powerful vibration dissolution effect has been acquired by adding a reinforcement structure to the perimeter part of a diaphragm,By this, the peek of the high region vibration which is in 30k-50kHz in audio frequency band outside was flattened, the ill effect into an audio frequency band was stopped, and the transient (transient response) property in an audio frequency band is improved.
A network circuitry is made direct, and in order to banish the member of a variation per hour, the attenuator for level controls is not carried. The high choke coil containing a silicon steel plate of a saturation level is adopted as a network part, and also the interference of a unit inter-network is eliminated by the circuitry separate scheme, the convergence single point grounding, etc.
It is used for a front baffle at 40mm, and the high-density and the quantity hardness particle board sorted out especially for the enclosure are used for 25mm, and a side plate / top plate / sole plate by a thickness of 20mm at the rear baffle. Moreover, the group which intercepts an oscillating propagation is prepared between a front baffle and the enclosure rear. Furthermore, a front baffle is considering it as the round baffle which gave big R, and also removing and flattening the decorative projection of a model-number emblem, a level controller, etc., and is suppressing the diffraction of an elastic wave, and the reflection.
There was a speaker table lamp for exclusive use as an option. It has a 4-piece structure by the product made from a hard particle board.
http://audio-database.com/ONKYO/speaker/d-77xx-e.html Scheme 3 ways, 3 speaker bass-reflex scheme, and a bookshelf type Using unit For low-pass: 31cm cone type For mid ranges: 12cm cone type For high regions: 2.5cm dome shape Play frequency band 28Hz - 45000Hz Cross over frequency 450Hz, 3000Hz The maximum input 230W(EIAJ) Impedance 6ohm Output sound pressure 91dB/W/m Cabinet internal volume 57L Dimensions Width 380x height 670x depth of 363mm (Saran net included) Weight 34kg Option: Speaker table lamp AS-77DX (an It is 1 set in two sets, 37,000yen) Dimensions The width 390x height 220x depth of 355mm Weight 7.5kg