SONICS AS-251
¥ 23,800 (1 unit, around the early 1970 s)
Commentary
51 series 3-way speaker system.
A 25 cm cone type woofer developed exclusively for the 51 series is installed in the low range.
Equipped with 12 cm cone type skoker in the middle area.
It uses carefully selected cone paper, and the occurrence of non-linear distortion is suppressed by the combination with lightweight roll edge.
A 7 cm cone type tweeter is installed in the high range.
A newly designed cone made of a mixture of several kinds of pulp is used for the diaphragm. In addition, specially evaporated hard duralumin is used for the center cap to improve high frequency characteristics, transient characteristics, and high efficiency.
In addition, a newly designed diffuser is installed in front of the tweeter to improve directional characteristics.
Equipped with continuously variable level control.
The enclosure uses a bass reflex system.
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Model Rating
| Type | 3-Way, 3-Speaker, Bass reflex system, Bookshelf Type |
| Units Used | For low band : 25 cm cone type For Medium Range : 12 cm cone type For high range : 7 cm cone type |
| Frequency characteristic | 35 Hz to 22 kHz |
| Max Input | 70W |
| Impedance | 8 Ω |
| Output sound pressure level | 93dB/W |
| Crossover frequency | 1 kHz, 5 kHz |
| External dimensions | Width 328x Height 523x Depth 250 mm |
| Weight | 9.0kg |
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