Shure DFR22 Audio Processor with Feedback Reduction - A Versatile and Powerful 2x2 Processor

Probably not. Difficult if not impossible to set up properly. Supposed to be able to do all sorts of things but does none of them well and impossible to tell what exactly it is doing. Have seen them sold to churches and schools, but the systems usually sounded better with it removed. I would certainly prefer to use an iPad mixer like the Soundcraft Ui series. Far more control of limiting, gating, equalizing, and many other things too, and for a lot less money. These are sold to be a "do-it-all" device but IMHO are really just added to boost the profit margin. I have started a collection of these and similar DBX devices that were removed and the systems sounded much better without them. Note: none of these devices "prevent" feedback. They just attempt to reduce it when it occurs, but are generally only marginally effective. The best way to prevent feedback is proper speaker placement and good mic technique.

We use this at our tradeshow booth to minimize feedback from speaker that are constantly moving on stage. This is easy to get working and minimizes the feedback problems we previously had. We used it out of the box with no configuration, so I am sure we could get even more performance from the unit, but it is amazing to use.