Technics SB-X15
¥ 19,800 (1 unit, released in 1981)
Commentary
A speaker system that pursues the possibility of a small bookshelf and incorporates technologies such as high efficiency and computer-based design.
A 20 cm cone type woofer is installed in the low range.
The cone section of this unit uses kraft pulp as the main raw material and longer fibers than conventional ones, and is molded at the optimum press pressure. In addition, by arranging corrugation on the cone surface, a vibration plate with strong internal loss is realized.
In addition, the reverse-dome center cap and moltoprene edge are used to achieve flat frequency characteristics.
A large ferrite magnet with a diameter of 80 mm and weight of 245g is used for the magnetic circuit to improve efficiency.
A 4.5 cm edgeless tweeter is installed in the high range.
It has an edge-less structure with a bis-colloid support, eliminating the disturbance of frequency characteristics due to edge resonance.
In addition, magnetic fluid is filled in the magnetic gap to increase heat radiation effect and improve input resistance.
Linear phase design is applied to the unit layout.
In addition, high-density particle board is used for the enclosure, and computer vibration analysis and three way Z-stop are adopted, resulting in an enclosure with high and resistant to aging.
Equipped with a thermal relay to protect the speaker from excessive input.
Model Rating
| Method | 2-Way, 2-Speaker, Bass Reflex System, Bookshelf Type |
| Units Used | For low band : 20 cm cone type For high pass : 4.5 cm cone type |
| Frequency characteristic | 51 hz to 20 khz -10dB |
| Impedance | 8 Ω |
| Output sound pressure level | 91dB/W/m |
| Allowable input | 50W(DIN) 75W(MUSIC) |
| Crossover frequency | 2kHz |
| External dimensions | Width 252x Height 441x Depth 245 mm |
| Weight | 7.0kg |