The Hollow body is widely used in Jazz and Blues music, primarily because of their very clean and smooth tone, which is great for sustaining notes. Because of their low output style pickups, these guitars are more susceptible to feedback as they don't do well with high levels of gain and distorted tones. The body is completely hollow on the inside but does not have a sound hole quite like the acoustic guitar does. The body of these guitars are typically larger in size and very boxy in shape.