In speaker cabinets using multiple drivers, the sound produced by each driver can arrive at the listener’s ear at different times. (i.e. in a two-way system, the sound from the tweeters arrives before or after the sound from the woofers). This results in degraded transients in the audio. A variety of factors affect this, including crossover, driver and cabinet design. Speakers that are set up to correct for timing problems (whether using electronic delays or physical methods) are said to be “time aligned”.