The Sansui ECA-3 is an active electronic crossover designed for use in audio systems, specifically featuring a 4-channel additional amplifier. This model was manufactured between 1970 and 1973 in Japan, showcasing a silver and black design housed in a wooden cabinet. With an approximate original price of 1,728 DM, the ECA-3 is part of a broader series that includes models like the AU-111, AU-222, AU-555, AU-777, AU-888, and AU-999. This crossover provides a means to separate audio signals into different frequency ranges, allowing for more tailored amplification for specific speakers, ultimately enhancing sound quality.
