The DBX 286S is a channel strip with microphone preamplifier, compressor, expander/gate and de-esser. It has the famous DBX quality of OverEasy.
Vocals only benefit from clear and clean sound, which will often boost harder 'S', 'P', and 'B' sounds in all the wrong placed. The DBX 520 is designed to suppress those harsh peaks while leaving a squeaky clean signal.
The DBX 560A puts insanely flexible compression directly in your rack. The design has been directly based on the classic, character filled DBX 160A to shape the same razor sharp audio.