Solid State Logic Ltd. (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 City, Paris, and Tokyo, with additional support provided by an international network of distributors.

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.

SSL introduced SuperAnalogue design in the SL 9000 J Series console, which utilized a capacitor-free signal path to achieve very high bandwidth with extremely low distortion.

In 1996 Billboard magazine's Studio Action Chart reported that 83% of number one singles that year had been produced using an SSL mixing console.

Duality featured updated signal routing controls, accessible from the console's center section rather than on each channel.

The same year, the company announced its expansion into broadcast video content management and delivery with their MediaWAN system.