Gibson’s ES semi-hollowbody guitars have a solid center block into which the pickups, bridge, and tailpiece are affixed. This not only gives the guitar sustain characteristics more similar to a solidbody, but also provides feedback resistance. Even so, B.B. reportedly used to stuff rags into the f-holes of his ‘335, and ultimately requested that Gibson omit the f-holes altogether from his Lucille signature model. This gives the guitar a unique sonic profile, somewhere between a semi-hollowbody and a chambered solidbody. It does indeed provide superior feedback resistance, while the hollow body cavities on either side of the center block enhance the tone with rich warmth and resonance.