Hi Wayne, I friend of mine (DIY Forum) is using a 3-way design with a 10"Wo-Vifa P25, a 5"Mid-Seas MCA15 (Fs=51Hz/Fsc=160Hz) and a standard Tw-Seas 27TFF. He has the idea of bringing the xover to the 300Hz region, and I don't know if that is better, or up to the the 600/900/1K region (if voices are in the 90-1000Hz band). Upper filter in the 2K500/3KHz region. Thanks.
Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
I try to keep crossover out of the 200Hz to 2kHz range as much as possible. Since many of my two-way designs use DI matching of a direct radiator to a horn, and since this requires crossover between 1kHz and 2kHz, I compromise and crossover at 1.6kHz. I've gone as low as 1.2kHz but don't like going down further, which is why I avoid 1kHz crossovers. Similarly, with three-ways, it's very tempting to compromise the woofer-to-midrange crossover point from 200Hz up to 500Hz or 600Hz on the woofer-to-midrange point, since that makes choices for midrange drivers so much more plentiful. You can go with a smaller driver if the crossover point is moved up. Horns get way smaller if you move up in frequency. But I just don't like the sound of speakers crossed over between 500Hz and 1kHz. Seems there's no getting around it, so I prefer to keep as much of the 200Hz to 2kHz range as possible covered by a single driver.
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