This feedback suppressor proved to be great. I'm using it for a Breedlove Atlas and I can put it on, or take out any time, even if I don't change (remove) the string. It is really easy to mount, and it is extremely helpful for live stages. Haven't had any problems since I bought it. I'm using it for 3 years extensively.
Bit of rubber which bungs up the sound hole on my acoustic bass to stop feedback when amplified. Simple to install/remove, and does the job without getting in the way. If I play the bass unplugged, it is obviously quieter, therefore doesn't bother anyone else in the house, but is still loud enough for me to hear properly, and the sound isn't "coloured" by the obstructed sound hole.
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