500series
500-series is a modular audio processing format used in recording and broadcast studios. It originated as a compact solution for mounting microphone preamps, equalizers, dynamics processors, and other analog processors in a single frame. The name derives from the approximate width of each module (about 1.5 inches) and the common 19-inch rack footprint; frames designed to hold these modules are often called lunchboxes.
In operation, individual modules slide into a frame that provides a shared backplane with power rails and
Typical modules include mic preamplifiers, equalizers, compressors, limiters, de-essers, and other character processors. The modular approach
Advantages of 500-series include a compact, portable, and cost-efficient route to a substantial analog processing setup,
The 500-series ecosystem is broad, with products from many manufacturers and a strong presence in professional