Here is some advice on how to prevent your Hollow Body electric guitar from feeding back:
Question:
I just purchased an Epiphone Casino and when I turn my amplifier up to the volume level that I need for stage work, I get a large amount of guitar feedback. None of my other guitars do this. (I also play a Strat and a PRS) I love the guitar, but how can I gig with it and not have feedback problems?
Answer:
The reason that you’re having feedback occur is because the Casino is a hollow body electric, and the body vibrates like an acoustic guitar.
To prevent this from happening, get some soft foam rubber, and cut it into long, skinny strips, approximately 16″ long and 3/4″ thick. Gently insert the foam strips into your guitar through the f-holes, taking care not to put any pressure on the wiring inside. The foam will deaden some of the resonance in the guitar that causes feedback.
You won’t need to fill the guitar, as it won’t take much to decrease the feedback. Start with a little foam rubber, and add more if you need, until you find the right amount. It also pulls out easily if you wish to remove it.
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