Brian May's tone on Bohemian Rhapsody is built on a unique combination: his homemade Red Special guitar played with a sixpence coin, a Dallas Rangemaster treble booster slamming the front end of a Vox AC30. The treble booster adds gain and upper-harmonic sparkle, pushing the AC30's Top Boost channel into a rich, creamy overdrive. May's multi-tracked guitar harmonies on this song create an orchestral wall of sound, but each individual guitar part has this distinctive bright, singing character.