M&K Sound
The journey began in 1973, when Walter Becker of Steely Dan commissioned M&K Sound to design a studio reference subwoofer and monitoring system for the Pretzel Logic LP mixing sessions. The result was the world’s first balanced dual-drive subwoofer and Pretzel Logic went on to become a million-selling Top Ten hit and one of Rolling Stone magazine’s 500 Greatest Albums of All Time.
Manufacturer's Website: https://mksound.com/