The DFR22 from Shure is a two-input, two-output digital audio processor with feedback reduction. It features a software interface with “drag and drop” controlled. Buy Shure DFR22 Audio Processor with Feedback Reduction – A Versatile and Powerful 2×2 Processor: Studio Recording Equipment – ✓ FREE. Only at Sweetwater! ✅ 0% Financing, ✅ FREE Tech Support, and ✅ FREE Warranty for your Shure DFR22!.

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You can also link processors for more efficient global control.

For gain control, use either a potentiometer or two momentary switches one for gain up and one for gain down. When df22 are ringing out a system and notice that many frequencies feed back simultaneously, even when you increase the gain slowly, you have reached the point of diminishing returns.

DFR22 Audio Processor

Each input is routed to each output. However, you can configure the device to automatically remove dynamic feedback filters and changes to the depth of fixed feedback filters, according to parameters that you xhure. Copy and paste processing blocks to any input or output to duplicate processors across multiple channels. Not in the U. When properly configured, the DFR22 changes to the appropriate preset in response to the switch.

Mount the DFR22 in any standard inch audio equipment rack, using the supplied screws. Additional rack mount supports may be necessary for mobile installations. The Auto Clear button will blink. How does the Zhure differentiate xhure feedback and music? The DFR22 comes with three factory-configured presets. Each DFR22 output has a 12 dB pad and an 18 dB pad that can be engaged through the software interface.


Registration allows you to receive information about software updates as they become available. Each filter has its own timer, starting from the time it is set or changed.

Use the pin shurw listed in Table 3. Any remaining pins can then be used to adjust gain or to mute channels. To establish the Auto Clear function, proceed as follows: The Shure DFR has quickly become the industry standard for effective feedback reduction. You should leave some filters available to catch feedback that might occur later, when the sound system is in use. Figure 16 shows a typical connection between a potentiometer and the Control Input pins.

DFR22 Audio Processor

In either case, you only need to connect three wires: If you do not press the LOAD button, the preset will not change and the display will return to the original Live preset. The DFR22 also allows real-time design changes, so you can add, subtract, or change processing blocks as you tune the system.

When this algorithm detects feedback, it inserts a shallow, narrow filter into the audio path, reducing gain at the frequency that is feeding back. Auto Clear will automatically re-designate any engaged filters as fixed and the rest as dynamic.

The DFR22’s feedback reduction algorithm can be used as a tool during system setup and for peace of mind against unexpected feedback. Gain Control Connections For gain control, use either a potentiometer or two momentary switches one for gain up and one for gain down. Signal going into each input is analyzed independently, but the feedback reducer applies the same notch filters to each channel. Architect Specs Shure Architectural Specs en zip 2.


It is also a powerful setup tool in live music applications. Because the feedback reducers always apply the same filters to both channels, the DFR filter indicators and controls are linked. If you leave the preset indicator at [-h], Auto Clear will only work on a preset change or power cycle.

Find your service and support in your country here. Email Address Sign Up. Control Pin Connections The control pins on the back of the DFR22 connect to switches, potentiometers, and controller hardware. The preset indicator will display a flashing [-h]. The DFR22 will automatically insert a notch filter to attenuate that frequency. For live professional DJ mixing: DFR22 Features Shure’s patented digital feedback reduction algorithm: Packaging Info ybyzzfbdfctfcutf Package Weight Presets can be built and edited entirely by clicking, dragging and dropping with the mouse.

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