Feedback is a major problem caused by a variety of sources, including microphone placement and overdriven PA’s and amps. By installing the Planet Waves Screeching Halt sound hole cover, players will immediately react to the increased volume before feedback of most acoustic and acoustic/electric guitars. A special tapered contour allows for a tight, custom fit without endless adjustments. The cover will adapt to most pickup systems without disrupting placement or performance. Will adapt rapidly to most guitars, allowing the player to crank the volume and is safe with most finishes and inlays