The majority of speakers have a woofer or low-frequency driver and a tweeter. A crossover is built into the speaker's enclosure, splitting the audio signal and directing low frequencies to the woofer and high frequencies to the tweeter. Manufacturers of speakers may build a 3-way driver layout in some instances. These speakers normally have three speaker drivers: a woofer, a mid-range driver, and a tweeter. The crossover divides the music into three parts, sending low frequencies to the woofer, mid-range frequencies to the mid-range driver, and high-frequency signals to the tweeter. Due to the separation of bass and mid-range frequencies, 3-way speakers sound cleaner.