Technics SB-F20

The SB-F20 (also SB-F20K) was a dual air suspension/bass reflex speaker system manufactured by the Technics Corporation of Japan. It is a 3-way 3-speaker system with 14 cm cone woofer, dome type tweeter, and 6 cm midrange. In this service manual you can get detailed specifications of the crossover circuit diagram, and parts list. If your speakers are not working, then this information may be very useful to you for repair.