It will take a while to get accustomed to the new sound but they should break in relatively quickly - a few minutes of hard driving music will generally do it for the suspension (spiders can be stiff initially) and perhaps a few hours for the cap in the crossover (may or may not be audible depending on quality and design). After a few hours most of the change should be your acclimitazion to the new way your music collection sound (you have to update your sonic memory and this takes the longest time).
