Magician Loudspeaker is a curse fiend man from Gateway Castle in Xanth. He was first mentioned in Demons Don't Dream.
Loudspeaker was killed in battle with Hydrogen in 408.
Loudspeaker was an Evil Curse Fiend who turned the curses on his own folk. Hydrogen defeated him, creating the Forbidden Regions in the process.
Novels: Demons Don't Dream, Swell Foop