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141 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Fri, 22 February 2013 15:25 «»
By: Wayne Parham
Re: flanking subs with small mains
Keep in mind that the flanking sub / helper woofer approach does most of its thing between 80Hz and 200Hz. So if the mains can run to 80Hz, you can run helper woofers like I described and get as much benefit from them as flanking subs that are typically...
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Forum: Pi Speakers «»
Posted on: Sun, 10 February 2013 12:06 «»
By: Wayne Parham
Re: Downfiring flanking subs ??
Flanking sub orientation doesn't matter since the sound radiated from them is omnidirectional. In fact, the problem flanking subs mitigate is caused by the omnidirectional nature of this band of frequencies coming from the mains. Self-interference from...
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Forum: Pi Speakers «»
Posted on: Mon, 04 February 2013 10:56 «»
By: Wayne Parham
Re: Flanking Subs vs Helper Woofers, revisited
You can build what I would describe as a "detatched 2.5-way" speaker. Essentially it is a DI-matched two-way with a second midwoofer in a separate box, physically located as presecribed for flanking subs, i.e. just beside, behind and below the...
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Forum: Pi Speakers «»
Posted on: Tue, 29 January 2013 16:10 «»
By: Wayne Parham
Re: Why do you not use summed bass for flanking subs?
I think if it works, then it's a good solution. Modal smoothing with dense interference is as much an art as a science. I mean, there's "science" in it, of course, but we're mitigating interference problems rather than solving them, so it's a...
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Forum: Pi Speakers «»
Posted on: Sat, 29 December 2012 09:09 «»
By: Wayne Parham
Re: Flanking Subs vs Helper Woofers
You can use flanking subs on every main speaker you have, for every channel. But I think the most important channels are the L/R mains, because they are so important to the presentation. Still, you could run flanking subs on every channel. That woul...
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Forum: Pi Speakers «»
Posted on: Fri, 28 December 2012 17:20 «»
By: Wayne Parham
Re: Flanking Subs vs Helper Woofers
A decorrelation filter randomizes the signal. It is like adding jitter or reverb. That way the self-interference pattern is not well-defined. It's like putting the subs in several places at once.
Here is a paper on the subject of decorrelation fi...
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Forum: Pi Speakers «»
Posted on: Fri, 28 December 2012 13:02 «»
By: Wayne Parham
Re: Flanking Subs vs Helper Woofers
Flanking subs and distributed multisubs are different animals. They have a similar purpose and correspondingly similar execution but have some specific differences because of the frequency ranges where they are intended to be most effective. Flanking s...
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Forum: Pi Speakers «»
Posted on: Thu, 27 December 2012 19:14 «»
By: Wayne Parham
Re: 3pi, smaller cab possible?
Changing the size of the baffle will alter the speaker's directivity at low to midrange frequencies. At low frequencies, the speaker radiates omnidirectionally but as frequency rises, the baffle begins to limit the radiation pattern to the forward-facin...
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Forum: Room Acoustics «»
Posted on: Tue, 18 December 2012 11:13 «»
By: Wayne Parham
Re: speaker location and type
Speakers in corners don't need flanking subs, but they do still benefit from more distant distributed subs. I don't think I'd put a sub immediately below the corner speakers, because then you would have two bass sound sources in the corners, which is a ...
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Forum: Pi Speakers «»
Posted on: Thu, 29 November 2012 12:58 «»
By: Wayne Parham
Re: Flanking Subs vs Helper Woofers
Flanking subs do not get a summed signal - They get the same signal as the main speaker they are flanking, with a low-pass filter applied. They're stereo subs. That's one of the key distinctions between flanking subs and more distant distributed subs in ...
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