Technics SB-4000

The SB-4000 (also SB-4000K) was a 75-watt linear phase speaker system manufactured by the Technics Corporation of Japan. It is a 2-way 2-speaker system with 20 cm cone type woofer, and 6 cm tweeter. The dimensions of the cabinet are 28.0 cm × 56.1 cm × 24.8 cm, and mass 10 kg. In this service manual you can get detailed specifications of the crossover circuit diagram, and parts list. If you need to repair your speakers, then this information may be very useful to you.