BOZAK B-300 ConcertoIV
¥ 80,500 (1 unit, around 1966)
Commentary
This speaker system was developed as the most standard system in the TRIO-BOZAK lineup.
The configuration is the same as the B-312, but the volume of the enclosure increases the bass playback capability.
Equipped with a 30cm2-way coaxial speaker unit for all bands.
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 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 | 2-way, 1-speaker floor type |
| Units Used | All Band : 30 cm Coaxial Type For Low Band : 30 cm Cone Type (B-199A) For High Range : 5 cm Cone Type x2 (B-200Y) |
| Frequency characteristic | 40 Hz to 20 kHz |
| Impedance | 8 Ω |
| Rated input | 20W |
| Crossover frequency | 2.5 kHz, 6dB/oct. |
| External dimensions | Width 600x Height 765x Depth 500 mm |
| Weight | 41kg |