What is a crossover?
A crossover is an electrical filter. All tweeters need a ‘high pass’ filter. This means the filter only allows high frequency sounds to reach the tweeter. If you feed low frequency sounds to a tweeter it will try and move large amounts and possibly be damaged. You can, if you wish, put a ‘low pass’ filter on a woofer. This means that it doesn’t have to play the really high notes which the tweeter is designed to handle. 4.