Equalizer or equaliser (see spelling differences) may refer to: An equalization filter, an audio processing tool used for equalizationA Gain Equalizer, passive microwave components used to correct system slope problems in equalizationA blind equalizer used in digital communicationsEqualiser (mathematics)Equaliser (sports)Equalizer (band)The Equalizer, an American action-adventure television seriesGAU-12 Equalizer, a type of Gatling gunEqualizer (Cheat Code Cartridge)Equal-i-zer, a brand of weigh… (More on Equalizer)