Technics SB-T20
¥ 29,000 (1 unit, released in 1981)
Commentary
A 2-way tower speaker system that employs a honeycomb planar unit.
18 cm honeycomb flat woofer is mounted in the low range.
A large strong magnet is used to achieve high efficiency. The voice coil bobbin is made of a laminated film of polyimide resin, which hardly deforms even at high temperatures. As a result, the voice coil bobbin has a high input resistance that can withstand high sound of 250 ℃.
In addition, moltoprene edge is used for the edge to improve the linearity when Chikara Dainyu is applied.
A 2.8 cm honeycomb flat tweeter is mounted in the high range.
A special shape equalizer is mounted on the front of the unit to make the frequency characteristics flatter.
In addition, magnetic fluid is filled in the magnetic gap to increase heat radiation effect and improve input resistance.
A high-density particle board is used for the enclosure. In addition to providing effective reinforcement through computer-aided vibration analysis, a 3-way Z-stop is adopted for the wooden framework, making it robust against changes over time.
Model Rating
| Method | 2-Way, 2-Speaker, Bass Reflex System, Tall Boy Type |
| Units Used | For Low Band : 18 cm Flat Type For High Frequency : 2.8 cm Flat Type |
| Frequency characteristic | 45 hz to 35 khz -10dB |
| Impedance | 8 Ω |
| Output sound pressure level | 90dB/W/m |
| Allowable input | 40W(DIN) 60W(MUSIC) |
| Crossover frequency | 3kHz |
| External dimensions | Width 230x Height 755x Depth 216 mm |
| Weight | 8.5kg |