JBL will do 4 way crossovers. Then there is the Logic 7 decoding. Then there are all of the EQ filters. Then there is the frequency dependent phase adjustments. Then there is the built in 8 channels of amplification if you want to use it.
And it does this on it's own from the programming done at Harmon. The guys at Harmon have learned a few things about speakers, speaker performance, and how to make things work in a car.
When you have the bank account that Harmon has, you can do pretty incredible stuff.