The API Collection features four processors based on legendary API modules: the 550A 3-Band Equalizer, the 550B 4-Band Equalizer, the 560 Graphic Equalizer, and the 2500 Stereo Compressor. Their hardware counterparts have been used for decades in countless hit records and now you can add that sweet API sound to as many tracks as you have DSP for. And in November for 20% less.