RCA

The early RCA limiters from the late 1930s were pioneering broadcast tools designed to control audio levels, preventing distortion and ensuring consistent sound quality. These units featured vacuum tube technology, providing smooth, warm compression that became essential for radio broadcasts and early eventually recording studios. Their robust build and reliable performance set the foundation for future dynamics processors.

Released in 1937
The RCA 96-A Limiting Amplifier, released in 1937 just six months after the release of the Wetsern Electric 110-A and it provided high compression capabilities with low distortion and uniform frequency response.
Released in 1947
The RCA BA-6A Limiting Amplifier is built for cost-effective, high-quality performance in FM, AM, and TV sound channels. It automatically controls audio peaks to prevent overmodulation, reducing distortion and interference. This amplifier also maximises transmitter power efficiency by enabling near-max output, boosting average modulation levels by several dB without adding significant harmonic distortion.

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