Technics SB-2
¥ 25,000 (1 unit, released in 1981)
Commentary
A compact speaker system that employs a honeycomb planar unit.
18 cm honeycomb flat woofer is mounted in the low range.
High efficiency is achieved by using a large magnet with a diameter of 90 mm and weight of 380g. The voice coil bobbin is made of laminated polyimide resin film with little deformation even at high temperatures, and is designed to withstand high temperatures of 250 ℃.
A 2.8 cm honeycomb flat tweeter is mounted in the high range.
High efficiency is achieved by adopting a large magnet in the magnetic circuit, and high input resistance is achieved by filling the gap (magnetic gap) between the voice coil and pole piece yoke with magnetic fluid.
Equipped with a thermal relay protection circuit to prevent unit breakage due to excessive input or abnormal signal.
It uses an integrally molded special shape bass reflex port that does not leak standing waves.
Computer vibration analysis is used in the design of the enclosure.
Model Rating
| Method | 2-Way, 2-Speaker, Bass Reflex System, Bookshelf Type |
| Unit | For Low Band : 18 cm Flat Type For High Frequency : 2.8 cm Flat Type |
| Impedance | 8 Ω |
| Allowable input | 60W(MUSIC) 40W(DIN) |
| Output sound pressure level | 90dB/W/m |
| Playback frequency band | 55 Hz to 35 kHz -10dB |
| Crossover frequency | 3kHz |
| External dimensions | Width 223x Height 372x Depth 206 mm |
| Weight | 5.2kg |