Martin 18ACFBB Feedback Buster

Get your feedback problem in-check with this Feedback Buster. Simply place it in the soundhole of your acoustic guitar and proceed with a feedback-free show!

Bust that feedback! This black rubber feedback buster reduces feedback from acoustic and/or electric guitars. Just pop it into the soundhole and enjoy a better quality sound.


- Black rubber construction
- Reduces feedback with electric and/or acoustics
- Great for live use
- Fits most acoustic guitars
- Easily installed
WARNING: Cancer and Reproductive Harm -

Dimensions and Weight in Packaging
Base Item
Shipping Weight: 0.5 lbs
Shipping Dimensions: 5 x 5 x 1 in
Manufacturer Part Number (MPN): 18ACFBB

For support or warranty questions, please contact the manufacturer:
Phone: 610-759-2837


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