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213 Search Results Found |
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Forum: Speaker «»
Posted on: Fri, 11 December 2009 08:20 «»
By: Wayne Parham
Re: What Exactly Is A Waveguide?
Waveguides are horns that use smooth contours like quadratic or oblate spheroidal flare profiles. They do not use diffraction as a wave shaping device. Their advantage is their lack of sharp edges within the flare, as those create discontinuities that ...
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Forum: Pi Speakers «»
Posted on: Sat, 05 December 2009 09:04 «»
By: Wayne Parham
Re: Horn angle !!!
Remember that the one π and two π speakers are budget models. They are more traditional cone/dome speakers and don't offer the benefit of uniform directivity. They still sound good to me, but I like them best as casual listening bedroom systems and sur...
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Forum: Pi Speakers «»
Posted on: Fri, 20 November 2009 18:57 «»
By: Wayne Parham
Re: Seven Pi Audition
Yes, I'm sure you're right. Then again, even though this is a semi-commercial venture it's really all about DIY. On one hand, this is a company support forum but on the other hand, it's really truly a DIY messageboard.
For the longest time, I gave o...
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Forum: Speaker «»
Posted on: Wed, 30 September 2009 14:03 «»
By: Wayne Parham
Re: Symmetrical and asymmetrical slopes in crossovers
Yeah, I understand. I used to depend on calculations and models very heavily because good measuring gear wasn't available a few decades ago unless you had pretty deep pockets. Even then, I don't suppose it is as good as what we have now.
Before I ha...
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Forum: Pi Speakers «»
Posted on: Sat, 05 September 2009 09:22 «»
By: Wayne Parham
Re: 2-Pi Tower floorbounce
That's key - Floor bounce interference manifests itself not only by the distance from midwoofer to ground but also the distance from source to listener. At 6-8 feet, it's around 150Hz.
The thing is, while you could smooth the notch with multiple soun...
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Forum: Pi Speakers «»
Posted on: Mon, 27 July 2009 09:54 «»
By: Wayne Parham
Re: Constant directivity, compression drivers and crossovers
I've made a few comments on other audio discussion boards but I keep the real meat and potatoes here. Most of what I say on other audio sites is just a regurgitation of things I've said here for years.
On the thread you're talking about on DIYaudio...
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Forum: Measurement «»
Posted on: Thu, 09 July 2009 16:33 «»
By: Wayne Parham
Crossover optimization for DI-matched two-way speakers
Recently I started a new project, and like all of my loudspeakers, I designed it to provide uniform coverage over a 90°x40° pattern. As most of you know, this means the loudspeaker has to be capable of providing good response throughout its coverage area...
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Forum: Pi Speakers «»
Posted on: Wed, 01 July 2009 14:19 «»
By: Wayne Parham
Re: 4PI plan with JBL 2227 & Altec 909-8A on 811B
I own a pair of 811's and love them for nostalgia's sake. They sound nice on axis too. But I do not have any designs that use 811 horns. All my designs use either the H290 or my own wood horn. These are much shorter than the 811, and that's a very impo...
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Forum: Speaker «»
Posted on: Tue, 30 June 2009 22:02 «»
By: Wayne Parham
Re: Two midbass horn layouts...
There are a lot of ways to skin a cat. But as for me, I try to keep the sound sources above the Schroeder frequency spaced so they sum constructively through a fairly large vertical arc which means relatively tight vertical spacing. The crossover shoul...
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Forum: Pi Speakers «»
Posted on: Tue, 30 June 2009 16:15 «»
By: Wayne Parham
Re: Help please ... from the bottom up
Response for the tower two π speaker looks like this:
This is a pseudo-anechoic measurement, so the bass isn't shown. The towers have nice, deep, full bass though. To put numbers on it, f3 is 40Hz and f10 is about 30Hz.
Its impedance curve ...
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