The Lute Hole Company 4" Soundhole Cover for Feedback Control  

Feedback can turn a delicate acoustic guitar passage into a screaming, earsplitting beast in the blink of an eye. You can help control feedback and add carved-wood beauty to your guitar with Lute Holes - solid wood carvings that fit into an acoustic guitar's soundhole. Available in maple, cherry, or walnut, Lute Holes install in seconds with no modifications to your guitar. Fits standard steel string 4"-diameter soundholes that have no neck protrusion in the hole. 3 different designs provide different levels of feedback protection—light, medium, and heavy. In most instances light protection is all that's necessary, so pick the design you like best and lock the beast in its cage!