I've searched through the archives, and read successful accounts of scaling down the Smith horns for a higher cutoff frequency. However, I've yet to see any information about scaling UP a Smith horn for a lower cutoff frequency.
Has anyone tried this yet?
Is it simply a matter of following the formulas in the 'Distributed-Source Horn' article? If so, I'll plow through the math to get a good starting point, but I'd need a recommendation for the throat area (So). I'd like to use a mouth thickness (t) of 2" for better integration with my 2" compression drivers.
One more question:
Exactly what is the throat area (So) Smith refers to? Is it the starting area of one of the individual cells?
Thanks in advance,