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Crossovers are a vitally important part of any loudspeaker system. With this chart, you can design your own crossover using simple building-block circuits. For example, in a three way system comprising of a woofer, midrange and tweeter, low pass, band pass and high pass filters are required respectively. A band pass filter is created by connecting a low pass and high pass in series. The dB per octave slope determines how sharply the response of the crossover will roll off after the crossover frequency. An octave is a doubling, or halving of frequency, for example 250Hz to 500Hz is one octave.
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