Axiom Home Page Forums General Discussion Home Theater Advanced crossover settings

Then what's the real advantage of having floor standing speakers that can go low when you're crossing over at 80hz? And if I was crossing over at 80hz would I really be able to tell a difference between the 80's and the 22's? I know there's a separate stereo/direct crossover I can use, so perhaps for music listening I could take more advantage of the 80's bass capabilities. One final question, why do receivers have separate crossover settings for speakers if it can lead to gaps in bass response (i.e. crossing over the mains at 40, the rest at 80hz leads to it essentially setting the crossover at 40hz, which leaves a gap for all the other speakers if they cannot go down to 40).