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142 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Sun, 20 January 2013 13:01 «»
By: Wayne Parham
Re: 4 PI by Andy
Damping material is not needed in traditional subs run outdoors, distributed subs in a multisub arrangement, or pretty much any subwoofer that is acoustically small. But that's a key: The subwoofer cabinet must be acoustically small, which means the lo...
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Forum: Pi Speakers «»
Posted on: Fri, 18 January 2013 16:59 «»
By: Wayne Parham
Re: Subwoofers vs budget... where do you draw the line?
The multisub approach is intended to mitigate room modes. The problem is the direct sound from the subwoofer and the reflections from each boundary combine differently at each point in the room. So there are hot spots and dead spot in the room, and the...
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Forum: Pi Speakers «»
Posted on: Sat, 29 December 2012 09:55 «»
By: zheka
Re: Flanking Subs vs Helper Woofers
Wayne,
I totally buy the idea. I always wandered what can be done about the ugly notches right above subwoofer crossover point. With my faulty implementation of the flanking subs technique, I've seen the proof of how well additional sources in the reg...
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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 15:31 «»
By: zheka
Re: Flanking Subs vs Helper Woofers
Can you explain what the decorrelation filters are, how they work, how effective can they be in multisub and what kind of processors are used to make them?
Thank you very much.
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Forum: Room Acoustics «»
Posted on: Tue, 18 December 2012 09:33 «»
By: Wayne Parham
Re: speaker location and type
Speaker placement depends largely on the type of speaker you choose. Some need to be in free space, not near walls. Others work better when placed close to walls. Some are designed to be placed in corners. Some should be pointed at the listening area...
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Forum: Speaker «»
Posted on: Wed, 12 December 2012 15:18 «»
By: Wayne Parham
Re: Room modes, multisubs and flanking subs
Specific multisub placement advice:
Welti configuration
Geddes configuration
Parham "flanking sub" configuration
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Forum: Pi Speakers «»
Posted on: Sun, 09 December 2012 10:04 «»
By: zheka
Re: 4PI Cabinet plans / question
Is there any reason why the same logic cannot be extended to tapped horn subs? In other words, can THs be mixed with sealed and bass-reflex subs in multisub setups?
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Forum: Pi Speakers «»
Posted on: Thu, 29 November 2012 14:58 «»
By: zheka
Re: Flanking Subs vs Helper Woofers
If flanking subs are designed to address boundary interactions and room modes only in the 80Hz-200Hz region, can "mid-bass" bass-reflex modules with high efficiency pro-drivers be used instead of full fledged subwoofers designed to go much lower?...
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Forum: Pi Speakers «»
Posted on: Thu, 29 November 2012 14:39 «»
By: Wayne Parham
Re: Flanking Subs vs Helper Woofers
You're right that home theater sound processors don't have any provisions that make flanking subs or distributed multisubs any easier. Honestly, the underlying philosophies and technologies most home theater processors are based on was developed before ...
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