DFR22 - Audio Processor


Audio Processor

Audio processor provides an affordable, full-featured 2x2 option with drag-and-drop software. Features include DFR Automatic Feedback Reduction, Parametric and Graphic Equalizers, Automatic Gain Control, Gate Expander, Ducker, Subwoofer, and more.

Product Details

Two Channels. A Powerful Processor. The Shure DFR has quickly become the industry standard for effective feedback reduction. The DFR22 builds on that reputation to provide an affordable full-featured 2x2 audio processor with drag-and-drop software.

The DFR22 is ideal for installed sound reinforcement applications, such as houses of worship, theaters, and meeting facilities.

DFR22 is also a powerful setup tool in live music applications. Using the DFR22’s drag-and-drop graphical user interface, processors can be placed anywhere in the signal path.

  • DFR Automatic Feedback Reduction
  • Parametric and Graphic Equalizers
  • Cut/Shelf Equalizer
  • Compressors/Limiters
  • Automatic Gain Control
  • Gate/Downward Expander
  • Ducker
  • 2-Way Crossover
  • Subwoofer Processor
  • Splitter
  • Delay Processors
  • 2x2 Matrix Mixer



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Service & Repair

Detailed policy information regarding customer service numbers, service modifications, and replacement parts.

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Software and Demos
Find An Answer
How may I use my USB port to connect to the DFR22, P4800, DFR11EQ, UA888 or DP11EQ?
June 27, 2018

It is possible to use either the USB port or the ethernet port on your laptop to control these devices. For information on using the USB port, read th ...

DFR22 RS232 Codes - AMX / Crestron Subprograms
February 22, 2018

Download the DFR22 serial strings in PDF format, including examples and communication protocol.Download an AMX Netlinx module (written by AMX).Downloa ...

Bi-color LED indication on Logic Outputs of P4800, DFR22, SLX4L, SCM820, SCM810, SCM410
February 22, 2018

The following diagrams show how the circuit is made for a bi-color LED. This can be used with any Shure product that has Logic Outputs on it. The 7400 ...

DFR22 Output LED Meter Displays Full Scale Reading Continuously
February 21, 2018

Whenever a Peak Stop Limiter processing element is used in the DFR22 processor, anywhere on a input or output strip, it is possible that one or both L ...