Feature	Feature Description
Crossover	The crossover splits up the frequency spectrum into pieces, which are then handed over to various speaker drivers. A crossover is necessary in a speaker because one driver cannot efficiently handle all sound reproduction tasks across the entire audible spectrum (the sounds distinguishable by the human ear - from around 20 Hz to 20 kHz). A two-way crossover, for instance, may split the frequency spectrum into a frequency band from 20 Hz to 2 kHz and from 2kHz to 20 kHz. The woofer section of the speaker would then reproduce the section from 20 Hz to 2 kHz while the tweeter took over above 2 kHz. This scenario works essentially the same for all crossovers, however, there are two specific types of crossovers - active and passive. Active crossovers are adjustable and require power (normally an AC power source from a wall outlet) to operate while passive crossovers are not adjustable (by the user, the factory can set the crossover but cannot change the setting without changing the crossover) and do not require power to operate.
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