White Instruments, founded in 1953 by Gifford White, is a pioneer in the design and manufacture of precision filters and networks. With a focus on research and industrial use, the brand quickly became known for its twin-T notch networks, which became standard components for manufacturers such as Westinghouse and General Electric. Over the years, White Instruments expanded its product line to include operational amplifiers and L-C wave filters, offering a full range of techniques to cover audio and sub-audio ranges.

With customers ranging from military and government agencies to research institutions and private industry, White Instruments has built a reputation for its high-quality filters. Its products have been used in various applications, from high-resolution sonar and seismic wave studies to spectrometers and engine balancing equipment. Aside from filters, White Instruments also made significant contributions to the audio industry, developing innovative test sets and sound analyzers.

The brand's passive and active equalizers, including the famous tapped toroidal inductors, have become benchmarks for room-sound system response adjustment. In recent years, White Instruments has embraced digital signal processing, introducing a range of multipurpose digital signal processors with flexible features such as parametric equalization, crossover, delay compression, and limiting. The brand's ParaMedic line, equipped with advanced DSP engines, offers powerful sound system equalization and filtering capabilities.

Under the leadership of Carl Van Ryswyk, who repurchased the company in 2002, White Instruments continues to innovate and support legacy products. With a commitment to excellence and a long history of delivering high-quality solutions, White Instruments remains a trusted brand in the industry