Wayne Parham Messages: 18756 Registered: January 2001
Illuminati (33rd Degree)
Do searches here because you'll find a lot of information about horn loaded loudspeakers and how to design them.
I will tell you this for starters: A horn is really maxxed out at a decade, which is a little over two octaves. So if you plan to horn-load that driver, keep this in mind. You can do a hybrid approach that rear loads the river with a Helmholtz cavity like Altec did to get some bass, or you can rear-load with a transmission line or horn. But those approaches complicate the design, and even a "standard" horn design is sometimes difficult for a first-time build because of the additional challenges of acoustic filter function created by the horn/waveguides, modified (but usually improved) directivity, shifting acoustic centers and requisite crossover phase, limited passband, etc.