BOZAK B-305 Concerto Grosso
¥ 177,500 (1 unit, around 1966)
Commentary
A floor-type speaker system that emphasizes sound quality.
Two 30-cm 2-way coaxial speaker units are installed for mid-range and high-range.
This unit is a combination of a 30 cm cone type woofer B-199A and a 5 cm cone type tweeter B-200Y for a total of 3 units.
The B-199A uses felted paper cone with wool mixed in pulp to achieve light weight, hardness and high compliance, as well as low distortion bass.
In addition, the vibration plate of B-200Y is made by dumping the metal diaphragm in a special method to suppress the wild behavior of the characteristics, and a smoother playback sound is obtained.
The mid-range is equipped with a 16 cm cone type mid-range B-209B.
In this unit, the metal diaphragm is dumped by a special method similar to the B-200Y to suppress the characteristic wild behavior.
The exterior of the enclosure has a walnut oil finish.
The terminal section is equipped with a multi-amplifier selector switch and multi-amplifier terminal.
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Model Rating
| Method | 3-way, 3-speaker floor type |
| Units Used | For low and high frequencies : 30 cm coaxial type x2 For Low Band : 30 cm Cone Type x2 (B-199A) For High Range : 5 cm Cone Type x4 (B-200Y) For Middle Range : 16 cm Cone Type (B-209B) |
| Frequency characteristic | 35 Hz to 20 kHz |
| Impedance | 16 Ω |
| Rated input | 30W |
| Crossover frequency | 800 Hz, 2.5 kHz, 6dB/oct. |
| External dimensions | Width 925x Height 765x Depth 500 mm |
| Weight | 63.6kg |