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213 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Thu, 08 November 2012 15:45 «»
By: Wayne Parham
π Constant Directivity Cornerhorn: Bass Bin Design Details
I did consider making the bass bin of my constant directivity cornerhorns using a folded horn, like the 12π hornsub. But upon careful considerations, I found a lot of disadvantages in that approach. These considerations are described in some detail in ...
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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: Pi Speakers «»
Posted on: Thu, 09 August 2012 10:38 «»
By: Wayne Parham
Re: H290C Horn/Waveguide
Some have asked why it is important to maintain 90° beamwidth in the horizontal, and why 100° or more is less desirable. For example, one of our friends here recently evaluated another similar waveguide/horn with ~100° coverage. The other horn was tout...
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Forum: Pi Speakers «»
Posted on: Sun, 29 July 2012 10:40 «»
By: Wayne Parham
Re: H290C Horn/Waveguide
Thanks for your kind words. If you're interested, some of the history is described in the following links:
High-Fidelity Uniform-Directivity Loudspeakers
Pi horn design philosophies
Corner pi speakers
π Cornerhorns - a brief history
Klipschorn vs...
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Forum: Pi Speakers «»
Posted on: Thu, 12 July 2012 08:08 «»
By: Wayne Parham
Re: H290C Horn/Waveguide
Measurements
all measurements taken using DE250 driver
mounted on infinite baffle, i.e. half-space
drive signal 8.4v
microphone distance 3M
Impedance
The impedance graph shows first 1/4λ mode is around 800Hz, and 1/2λ about 1.6kHz. You c...
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Forum: Pi Speakers «»
Posted on: Wed, 11 April 2012 13:34 «»
By: Wayne Parham
Re: 3pi Woofer / Horn Vertical Spacing
Look at the response charts:
three π loudspeaker performance dataYou'll notice the vertical nulls are centered at approximately 35° above and 25° below the centerline. That's a 60° spread. Even the spacing between the inside edges of the nulls is furt...
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Forum: Pi Speakers «»
Posted on: Tue, 03 January 2012 08:10 «»
By: Wayne Parham
Re: 2Pi Off-Axis Response
These don't have horns and weren't designed for constant directivity so I didn't record off-axis measurements every 10° like I do with my larger uniform directivity designs. But I have, of course, measured off-axis casually and can tell you that the hor...
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Forum: Pi Speakers «»
Posted on: Sat, 31 December 2011 18:28 «»
By: Wayne Parham
Re: how'd we get here (or where is this)?
Yeah, you're right. I found this path three decades ago and never looked back. There are other design types that have come and gone, the darlings of the day for audiophiles. But in this approach, I've never wavered. It's the best way to build loudspe...
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Forum: Pi Speakers «»
Posted on: Tue, 29 November 2011 14:35 «»
By: Wayne Parham
Re: Notes for the DIYer
As most of you know, I've been building CD/waveguide speakers like these for over 30 years. My first models all used a simple crossover, and we continued to build them that way through most of the 1980s. I always have tended to embrace Occam's Razor wh...
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Forum: Pi Speakers «»
Posted on: Tue, 01 November 2011 17:48 «»
By: Wayne Parham
Notes for the DIYer
Several new loudspeaker projects have been started that are similar to my three π and four π loudspeakers. So I'm getting lots of PMs and posts asking what I'd do about this and what I think about that. Most seem to be concerned with the crossover, thi...
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