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Re: Downfiring flanking subs ?? [message #93221 is a reply to message #93219] Fri, 26 February 2021 16:28 Go to previous messageGo to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18671
Registered: January 2001
Illuminati (33rd Degree)

What you're describing may work well. It's definitely better to have the flanking subs near the boundary than it is to have them near the mains they're flanking. This is counter-intuitive, I know, and it would not be true outdoors where we would want the subs in-phase with the mains. But indoors - with all the multiple phase relationships from room modes and SBIR - we benefit from having some distance between the mains and the subs.

But like I said above, what we want is to "fill in the hole" from SBIR with that wall behind the mains. That happens at the frequency where the distance from the midwoofer to the wall is 1/4λ. This is because the reflection from the wall is twice that, being 1/2λ away and causing 180° destructive interference. So by having another sound source in between the midwoofer and the wall, we are able to mitigate the problem. That second sound source will not have destructive interference at the same frequency. So it will "fill in the hole."
 
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