BOZAK B-312 ConcertoII
¥ 75,700 (1 unit, around 1966)
Commentary
This is a bookshelf type speaker system one size larger than the B-211.
The unit is equipped with a 30cm2-way coaxial speaker unit, B-207A.
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 enclosure is designed to accommodate additional mid-range units.
In addition, the exterior has a walnut oil finish.
The terminal section is equipped with a multi-amplifier selector switch and multi-amplifier terminal.
Model Rating
| Method | 2-way / 1-speaker / bookshelf type |
| Units Used | For All Bands : 30 cm Coaxial Type (B-207A) For Low Band : 30 cm Cone Type (B-199A) For High Range : 5 cm Cone Type x2 (B-200Y) |
| Frequency characteristic | 45 Hz to 16 kHz |
| Impedance | 8 Ω |
| Rated input | 20W |
| Crossover frequency | 2.5 kHz, 6dB/oct. |
| External dimensions | Width 610x Height 430x Depth 315 mm |
| Weight | 27.2kg |