I run a 4 way active system using a Marchand active crossover. All units are moveable so I time align by putting a signal through at the crossover frequency and check the response on my lapp top software DB meter. This I find works well for a particular listening position. Just lining up the speaker fronts the system sounds horrible.
I notice some quality speakers also Time Align.http://www.wilsonaudio.com/product_mezzo_tech.shtml

Dave