Equalizer or equaliser (see spelling differences) may refer to: An equalization filter, an audio processing tool used for equalization A blind equalizer used in digital communications Equaliser (mathematics) Equaliser (sports) The Equalizer, an American action-adventure television series GAU-12 Equalizer, a type of Gatling gun Equalizer (Cheat Code Cartridge) Equal-i-zer, a brand of weight distributing, sway-control trailer hitch. Equalizer (k-os song), A song by hip hop artist k-os on h… (More on Equalizer)