Wayne Parham Messages: 18786 Registered: January 2001
Illuminati (33rd Degree)
I would crossover to the subs somewhere between 70Hz and 100Hz. The frequency and slope will depend on the environment, the configuration of speakers and the position of each of them. Assuming you're using one or two four π speakers right above a single 12π hornsub and your environment is very large or outdoors, then I'd crossover the four π at 90Hz and the 12π at 70Hz, fourth-order slope on both. Sounds like there would be a hole but there's not because even fourth-order is not a brick-wall filter. Be sure to delay the signal sent to the four π speakers by 8mS. If you use a pair of four π speakers, stack them vertically with the tweeters together and woofers outboard, like an MTTM configuration.
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