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When multiple drivers are used in a system, a "filter network", called a crossover, is used to free the incoming signal into contrary frequency bands appropriate for each driver
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A woofer is a driver that reproduces lesser frequencies
- Some loudspeaker systems exercise a woofer for the lowest frequencies, bureaucratic it possible to avoid using a subwoofer
- Additionally, some loudspeakers bag the woofer to arm middle frequencies, eliminating the mid-range driver
- This can be accomplished with the alternative of a tweeter that responds low enough combined go with a woofer that responds colossal enough that the two drivers reckon up coherently in the inner frequencies.