Stereo Compressor
Based on the unprecedented success of the 2500, the 529 takes many of the features and controls from API's famous stereo compressor and puts them into the first dual slot 500 series module from API.
The new 529 compressor features API's patented THRUST® circuitry for a punchy low end, along with an Old/New switch that lets you choose between classic and modern compression characteristics: Old for vintage-style feedback compression and New for today's more common feed-forward compression. The Auto-makeup Gain button allows for ratio and threshold adjustment without affecting the output level.
Using API's discrete op-amps and transformer technology, the 529 provides the legendary analog sound of API.
These merchants probably sell this module. Huh?