Wayne Parham Messages: 18726 Registered: January 2001
Illuminati (33rd Degree)
I wouldn't alter the R1/R2 values when using the 2227 in place of the 2226. The reason is most of the increase is above 500Hz. The octave between 500Hz and 1kHz is a little hot with the 2227, but I don't think I'd increase the tweeter to match the higher levels. I'd rather leave the tweeter at the lower ~500Hz levels.
As for horn differences, you could really write a book on that subject. Please consult the "High-Fidelity Uniform-Directivity" whitepaper I mentioned in my last reply.
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