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77 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Fri, 23 January 2009 18:10 «»
By: Wayne Parham
Re: Single sub bad - multi subs good
I agree with you about running subs and mains as stereo pairs. If outdoors or in a very large room, I'd also agree about keeping subs and mains within 1/4λ at the crossover point. That's essentially what you're saying, I think, when you talk about being...
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Forum: Pi Speakers «»
Posted on: Tue, 13 January 2009 13:14 «»
By: Wayne Parham
Re: Subwoofer Recommended for 2 Pi Towers?
Bass from the eight π is deep and full, much like the two π towers. So you can certainly enjoy them without subs. But these speakers are a step up, in that they do provide uniform directivity. They can be placed in corners, much like a π cornerhorn, or...
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Forum: Pi Speakers «»
Posted on: Sun, 11 January 2009 15:18 «»
By: Wayne Parham
Re: Subwoofer Recommended for 2 Pi Towers?
I don't run subs with my two π towers.When you asked about subs I gave some suggestions as to what could be used, but don't take that as a recommendation either for or against using them.The multi-sub approach is a strategy that smoothes the energy distri...
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Forum: Pi Speakers «»
Posted on: Wed, 07 January 2009 12:15 «»
By: Wayne Parham
Re: Positioning and subs
I have always liked corner placement where possible. It sets the radiation angle at frequencies above the Schroeder frequency. If a sound source would radiate omnidirectionally otherwise, placing it in a trihedral corner forces radiation to be limited t...
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Forum: Dungeon «»
Posted on: Fri, 02 January 2009 20:56 «»
By: Wayne Parham
Re: Projects aplenty
My living room is large but was not purpose-designed for acoustics. It is, however, well damped and large, so having speakers that create a uniform reverberent field and using multiple distributed subs, I expect to be able to optimize this room quite nic...
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Forum: Speaker «»
Posted on: Sun, 13 July 2008 18:58 «»
By: Wayne Parham
Re: Woofer directivity
There is a formula to find the directivity of a direct radiating woofer but understand that it is just an approximation. You can expect a rigid flat piston radiator to generate a 90° pattern (-6dB) at the frequency where diameter equals wavelength. Chap...
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Forum: Pi Speakers «»
Posted on: Tue, 08 July 2008 17:52 «»
By: Wayne Parham
Matching directivity in the vertical and the horizontal planes
One of the main reasons I have always used asymmetrical horns is to match directivity in the vertical plane as well as in the horizontal plane. I have always found the matched-directivity two-way configuration to sound very smooth because it generates a...
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Forum: Pi Speakers «»
Posted on: Thu, 26 June 2008 18:18 «»
By: Wayne Parham
π cornerhorn behavior
The π cornerhorn reaches pretty high because of its simple design. It provides useable output over the woofer's entire range.On casual inspection, one would expect a self-cancelling reflection notch in amplitude response at the frequency where the woofer...
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Forum: Pi Speakers «»
Posted on: Thu, 26 June 2008 13:50 «»
By: Wayne Parham
Uniform directivity
The B&C DE250 is one of the smoothest compression drivers I've ever heard or measured. For that matter, it's one of the smoothest tweeters of any type I've measured. It doesn't reach beyond 18kHz, but up to that point, it is smooth as silk. A DE250 on ...
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Forum: Pi Speakers «»
Posted on: Thu, 12 June 2008 12:11 «»
By: Wayne Parham
Let's look at this
Are you sure the compression driver isn't damaged? I'll bet something has happened to it, possibly debris behind the phase plug or in the gap. You may have just gotten a bad driver with a damaged diaphragm or something.I ask because I've never heard or ...
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