The reference-class MDX4600 is a marvelous 4-channel expander/gate/compressor/peak limiter. Ideal for compressing mono/stereo signals and providing virtually inaudible noise suppression, without loss of high frequencies, increasing vocal presence and energy and limiting or smoothing out extremely-high signal peaks. Additionally, the MDX4600 features an integrated dynamic enhancer and Low-contour filter to provide the ultimate in signal enrichment. Put simply, the MDX4600 can do amazing things for your vocals or instruments providing virtually everything you need for studio-quality dynamics processing.