Tame unwanted stage noise with the Martin Feedback Suppressor, built to give acoustic players greater control over their amplified tone. Designed for dreadnought, jumbo, and grand performance body sizes, it reduces feedback and allows for higher volume levels in live settings without compromising your sound. Made from nitrocellulose-safe material to protect your guitar's finish, the suppressor fits easily into 4" soundholes for quick installation and removal, ideal for gigging acoustic musicians who need their natural tone to shine through minus the noise. Features Reduces unwanted feedback, letting acoustic-electric players push higher volume on stage without losing tone quality. Sized to fit standard 4" soundholes on dreadnought, jumbo, and grand performance body guitars. Nitrocellulose-safe material protects your guitar's finish from damage during use. Installs and removes in seconds without tools, so it fits before a set and comes out just as fast after. Lets your guitar's natural amplified tone come through clearly, with the noise stripped out. Specs Material: Nitrocellulose-safe Fit: 4" soundhole Compatibility: Dreadnought, Jumbo, Grand Performance body sizes Installation: Tool-free, easy fit and removal