AKAI AE-63
¥ 60,000 (a set of two cars, around 1983)
Commentary
This is a speaker system designed to improve the compact speaker by adopting Akai's original 3 dr (Three Dimensional Radiation) system.
The 3 dr system is designed to reproduce a three dimensional sound field by superimposing sound waves reflected from the back wall with direct sound waves from the front unit. The rear baffle is equipped with a mid-range unit and a passive radiator as well as the front baffle.
The passive radiator on the back is equipped with a base image controller with a fan-shaped opening, and the opening area can be adjusted to control the appropriate low range.
In order to take advantage of the structure of the 3 dr system, we recommend that it be installed 10 to 50 cm away from the rear wall.
The front baffle is equipped with a 16 cm cone type woofer for the low range and a 2.5 cm soft dome type tweeter for the high range. The rear baffle is equipped with a 16 cm passive radiator (Dron cone speaker) for the low range and a 3.0 cm soft dome type mid-range for the middle and high range.
Parts such as metallized film capacitors and air-core coils are used in the network to improve the quality.
The enclosure has a black piano finish and is designed with a 5 mm extruded aluminum panel mounted.
In addition, four corners are rounded to prevent diffraction phenomenon.
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Model Rating
| Method | 3-way / 3-speaker / 3 dr System / Bookshelf Type |
| Units Used | For low band : 16 cm cone type For high-pass : 2.5 cm dome type Back Center Area : 3.0 cm Dome Type Other : 16 cm passive radiator |
| Frequency characteristic | 60 Hz to 23 kHz |
| Maximum allowable input | 80W |
| Rated input (DIN) | 40W |
| Impedance | 4 Ω |
| Output sound pressure level | 88dB/W/m |
| Crossover frequency | 3kHz |
| Cutoff frequency | Rear mid-range : 800 Hz |
| External dimensions | Width 206x Height 345x Depth 170 mm |
| Weight | Approx. 6.2 kg |