ONKYO D-66
¥ 49,800 (1 unit, around 1986)
Commentary
A pure cross-carbon 3-way speaker system that supports digital sources by condensing pure transient policies.
A 26.5 cm cone type unit is used for the low range.
The diaphragm has a two layer structure consisting of cross carbon and pure carbon mat woven with carbon fiber as it is, and uses pure cross carbon diaphragm bonded with special epoxy resin with high internal loss.
The magnetic circuit uses a strontium magnet of φ 110x φ 60x φ 17 tmm, magnetic flux density 9000 gauss.
A 10 cm cone type unit is used for the middle area.
The diaphragm uses a pure carbon diaphragm realized by a unique special molding method.
It is finished uniformly with precision of 10 μ units by the special molding method.
A 2.5 cm ultra-high titanium dome unit is adopted for the high frequency band.
This diaphragm is made of ceramic by applying a special surface hardening treatment to the titanium base material itself, and is a stable and highly rigid diaphragm with little molding strain.
In addition to this, high-frequency resonance cancellation technology for high-end machines has been introduced to flatten high-frequency peaks unique to hard dome units and greatly improve transient characteristics.
The magnetic circuit uses a magnet with dimensions of φ 90x φ 45x13tmm and magnetic flux density of 18000 gauss.
The network is based on the network design concept of high-end machines and has been enhanced by eliminating colorization.
The enclosure is a round baffle with a φ 20 mm R on both sides of the front baffle to improve the sense of sound localization.
In addition, the strength of the whole structure is improved by sufficient plate thickness and reinforcement.
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Model Rating
| Method | 3-Way, 3-Speaker, Bass reflex system, Bookshelf Type |
| Units Used | For low band : 26.5 cm cone type For Medium Range : 10 cm Cone Type For high-pass : 2.5 cm dome type |
| Playback frequency band | 35 Hz to 45000 Hz |
| Crossover frequency | 450 Hz, 2500 Hz |
| Max Input | 160W(EIAJ) |
| Impedance | 6 Ω |
| Output sound pressure | 91dB/W/m |
| Cabinet internal volume | 35L |
| External dimensions | Width 325x Height 575x Depth 281 mm |
| Weight | 14.0kg |