Feedback Buster Reducer for Acoustic Guitars Soundhole Muter

Now you can reduce the volume/feedback level with the Feedback buster. Used for reduce the feedback in a live situation or reduce the volume for training at home. Made of a flexible elastomer, it’s easy to apply and doesn’t damage most finishes. We have 2 sizes : 10cm (4″)for standard size and 11cm (421⁄64″) Jumbo