500 series.

The 500 series is a versatile and compact modular format for professional audio equipment, widely used in studios worldwide. Known for its flexibility, the 500 series allows engineers and producers to create a custom signal processing chain by combining various preamps, compressors, EQs, and other modules from different manufacturers. Housed in a standard 500 series rack, these modules offer high-quality analog sound with the convenience of easily swappable components, making it a popular choice for those looking to build a personalized and dynamic studio setup.