A Talk Box This is a guitar and amp driving a midrange horn driver with a tube attached to the diaphram instead of a horn shaped sound output fixture. The open end of the tube is placed in your mouth and the guitar sounds are shaped by your mouth as if you were talking. Some commercial examples of this kind of talk box are: the Heil Talk Box, Electro Harmonix Golden Throat, the Banshee & a blast from the past, Kustom Electronics "The Bag" (I saw Jeff Beck use one of these, live, back in 1977.