Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
The Omega 15 driver had different specs when I designed the crossover, making the larger Zobel a better deal. But your math is right, so the 40uF cap would work just fine. The 60uF cap will do nicely too, just be five bucks more expensive. Zobels values aren't very critical.
I just looked up the specs on the new model, called "Omega Pro 15A" and saw they also lowered the Fs to 33 Hz, but now list the Usable Frequency Range as 51-1.7k Hz, instead of 35-2k Hz. Is there any practical difference here? Looks like the efficiency is still about the same.
Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
Eminence does this every couple of years. They change materials or manufacturing processes and the electro-mechanical parameters shift slightly. I've often wished they would chage part numbers or at least provide a version number to indicate changes but they won't even consider this. But they're pretty good about keeping the specs in a compatible range so the driver acts the same. Fortunately, I've not seen them change the diaphragm during these incremental changes, because different cone flex and breakup modes might make the tonal character of the speaker more different than slight T/S changes.
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