In your Pi speaker, the compression driver and horn, corresponding to the tweeter, are mounted flush with the woofer in the enclosure. A large slotted port is located next to this location. Recently, many two-way speakers have the compression driver and horn assembly mounted independently outside the enclosure. Schematically, if the woofer and horn are properly spaced apart and the enclosure volume for the woofer is appropriate, what are the acoustic or structural differences compared to the Pi speakers?