very cheap!!.. Shure DFR11EQV5 is a single channel computer-controlled processor that combines an equalizer,feedback reducer,limiter and delay in a single, half-rack enclosure.Designed for installed sound reinforcement applications, such as theaters, conference rooms, meeting halls or houses of worship,also an effective setup tool for controlling major feedback modes in live music applications. software & pdf user guide/manual smooth slightly used original made in USA input voltage: 110V/220V 2units available (17k each)*** negotiable ***

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