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24 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Sun, 20 January 2013 13:41 «»
By: zheka
Re: 4 PI by Andy
Thank you very much.
The box I am working on is also 10ft^3. The longest side is about 36" internal. It would not be used as true flanking sub but it may be low passed as high as 120Hz. If standing waves indeed form in this case, they would come ...
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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, 05 October 2012 23:15 «»
By: Wayne Parham
Pi Speakers FAQ
The π Speakers forum has a wealth of information, and the search feature provides a way to access all of it easily. However, this page offers introductory answers to frequently asked questions about our line of loudspeakers and the design philosophies we...
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Forum: Tower «»
Posted on: Sat, 26 May 2012 01:17 «»
By: Wayne Parham
Re: Thiele and Small were right
Hoffman's Iron Law strikes again!
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Forum: Pi Speakers «»
Posted on: Mon, 19 December 2011 15:02 «»
By: Wayne Parham
Re: One Cubic Foot Subs
You're so right. Hoffman's "Iron Law" (the one that says you can have two of three: deep bass, small size or efficiency) actually was a precursor to Thiele and Small's work. It's not just a seat of the pants thing, it's actually a quantifiabl...
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Forum: Speaker «»
Posted on: Sun, 20 February 2011 09:29 «»
By: Wayne Parham
Re: The Bigger the Better?
See "Hoffman's Iron Law".
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Forum: Pi Speakers «»
Posted on: Mon, 23 February 2009 13:07 «»
By: Wayne Parham
Cornerhorn implementations
I'll try to answer your specific question first, and then move on to "the bigger picture."
The Omega 15 is a better woofer than the Delta 15. Not that the Delta 15 is a bad woofer, I find it very pleasant sounding, but the cast frame, lar...
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Forum: Speaker «»
Posted on: Wed, 30 April 2008 14:43 «»
By: Wayne Parham
Re: Hoffman's Iron Law
It's the rolloff on the bottom that is sacrified when you make a small sub with high efficiency. You lose deep bass extension.
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Forum: Speaker «»
Posted on: Tue, 29 April 2008 18:18 «»
By: threeeyedowl
Re: Hoffman's Iron Law
Thank You very much for your response Wayne. Please clarify this statement a little for me since it's critical to our choices. "If you want high efficiency from a small package, you have to sacrifice deep bass and live with a higher cutoff point." Is this...
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Forum: Speaker «»
Posted on: Tue, 29 April 2008 14:28 «»
By: Wayne Parham
Hoffman's Iron Law
Hoffman's Iron Law states that the efficiency of a woofer system is directly proportional to its cabinet volume and the cube of its cutoff frequency. What this means is the most powerful subwoofer systems are necessarily large.You can probably match your...
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