Symetrix 564E Quad Gate Expander in good condition.
Product Key Features
Inputs/Outputs: XLR In
Effect/Enhancement: Noise Gating/Expansion
Number of Channels :4
Each of the four channels may be individually operated in GATE or EXPander mode. Balanced or unbalanced signals may be applied to the XLR style input connectors. To further expand the 564E’s functinal possibilities, a control loop (send and return) is included for devices like dleay lines and graphic equalizers. This allows special effects and manipulation of problem audio sources.