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A device that takes a full-range audio signal and splits it into 2, 3, 4, or even 5 different segments. A simple 2-way crossover provides an output for the lows and an output for the highs. Usually a control is given which allows the user to select what the crossover point will be. The outputs then feed separate amplifiers and speakers. This method provides better crossover linearity and power usage. Source: Church Audio & Acoustics Glossary