Solid State Logic (SSL) is a British company based in Begbroke, Oxfordshire, England that designs and markets audio mixing consoles, signal processors, and other audio technologies for the post-production, video production, broadcast, sound reinforcement and music recording industries. SSL employs over 160 people worldwide and has regional offices in Los Angeles, Milan, New York, Paris, and Tokyo, with additional support provided by an international network of distributors. Solid State Logic is part of the Audiotonix Group. History Early history Solid State Logic was founded by Colin Sanders in 1969 as the first manufacturer of solid-state control systems for pipe organs. Sanders coined the company's name to explain the then-modern technology of transistor and FET switching to organ builders. Sanders also owned and operated Acorn Studios, a recording studio in Stonesfield, Oxfordshire. When he sought a mixing console for recording, with routing flexibility and settings recall unavailable on consoles at that time, Sanders applied his experience to design and build his own, building two mixing consoles with computer control which featured one-button switching between recording, tracking and mixdown modes. The two prototype mixing consoles, given the model designation of SL 4000 A, became the start of a series of large-format mixers that would define and establish SSL as a mixing console manufacturer. Large-format mixing consoles In 1976, SSL combined the SL 4000's in-line mixing console design with a computer that provided fader automation and programmable tape transport auto-location functionality, A total of six B Series consoles were built for and sold to studios, beginning with Abbey Road Studios in London, followed by Le Studio in Morin-Heights, Canada, Virgin Records' Townhouse Studios in London, and Tocano Studio in Copenhagen. The SL 4000 E Series, introduced in 1979, offered various improvements on the B Series, including a new 4-band EQ section developed in collaboration with George Martin. Most notably, the E Series introduced the ability to save and recall mixer settings, and was the first mixer to feature a compressor/gate on every channel as well as the master bus compressor. SSL introduced the SL 4000 G Series at the AES New York Convention in 1987, which again offered a redesigned EQ, among other improvements. The ability to save and recall mixer settings, along with the inclusion of a dedicated compressor and noise gate on every channel on SL 4000 E Series consoles and its successors and variants drove widespread adoption in professional recording