Mikecom32 wrote:I'm pretty sure (almost positive) it just "splits" the sound. It eliminates frequencies that the speaker shouldn't be trying to produce, resulting in a cleaner sound. Most crossovers are just filtering circuits (esentially capacitors and resistors).
Someone correct me if I'm wrong.
You're correct. The basic function of a XO (crossover), is to split the sound between the different drivers (woofer, mid, tweet, ect..). It's also used for protection, filtering/contouring sound, and other mathematically fun things to bore people with.
Side note: Sometimes a component set will have a XO for the tweeter (HP for protection), but will cheap out and not put a LP on the woofer, meaning it will then play full range. So in that case, it's not "splitting" the signal, but instead just protecting the tweeter.