Appreciate your response, information, and input. Didn't intend to get into a discussion about the design principles. But since you started.... actually I understand (sorta) many of the variables involved for speaker design and that many speakers (drivers) have their own natural frequency roll-off and that in itself can act as a type of crossover, I was just curious anout the actual physical design because different roll-off frequencies and rates (6db, 9db, 12db/octive, etc) have a distinct effect on the sound (as well as the drivers). It was just that in my many years of listening and auditioning I had "discovered" that true 2 way speakers tended to sound more natural or cleaner to my ear, and all else being equal (even though it never is) I deduced that a significant factor to my listening experiences could well be the crossover. Funny eh?

Thanks!

Randyman