Quad auto gate dynamic processor. Two channels of full function compression, expansion, limiting and peak clipping in one unit of rack space. one of the industry standard multi-gate devices for both recording and live applications. Providing the same superb audio performance as its other 500 Plus - series, DN514 Plus packs four channels of frequency conscious gating into just 1RU. This provides a significant operational advantage, being able to tailor the operation of each gate to a specific frequency range.