A Vintage King 500 Series rack filled with 500 Series modules from Pultec, API, Neve, and Rupert Neve Designs. The 500 Series format consists of a whole slew of different signal-processing modules in a compact rack unit. Mic preamps, equalizers, compressors, DI boxes, filters, effects... You name it, you can find it in a 500 Series version from a wide variety of manufacturers. Most of those manufacturers participate in the VPR Alliance, established to set standards for the format to ensure that the end user can rely on consistent specifications with regard to voltage, current draw, size, etc. along with proper compatibility with existing modules. The essence of this idea is to make it simple for the user to mix and match modules from different makers, thus allowing for the broadest range of implementation for their products. Continue reading →