Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
It's not immediately obvious to know what's best in most cases. There are some general things you can know, like low order filters pass more out of band energy. That might be bad for a tweeter that can't handle much low frequency content, for example. But to know what slopes and topologies will work best, you have to do the math and test it to see.