Technics SB-M3

The SB-M3 (also SB M3) was a 200-watt honeycomb disc speaker system manufactured by the Technics Corporation of Japan. It is a 3-way 3-speaker bass-reflex system with 33 cm honeycomb disc woofer, 2.8 cm honeycomb disc tweeter, and 8 cm honeycomb disc midrange. The dimensions of the cabinet are 40.0 cm × 67.0 cm × 33.3 cm, and mass 31 kg. 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.