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275 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Sat, 10 April 2010 09:10 «»
By: Wayne Parham
Port position
Port placement on my speakers is really just an aesthetics thing. I think they look better when made in mirror images. When someone orders a single speaker, I'll ask if they want one with the port on the left or the right. But this isn't all that impo...
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Forum: Pi Speakers «»
Posted on: Fri, 08 January 2010 09:03 «»
By: Wayne Parham
Re: 1-Pi/2-Pi
I don't build transmission lines, as I've always used Helmholtz resonance to tune the box instead of pipe modes. I designed the box with standard Helmholtz resonance formulas and then used Martin King's spreadsheets to verify that port and driver plac...
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Forum: Pi Speakers «»
Posted on: Sat, 12 December 2009 09:26 «»
By: Wayne Parham
Re: 4-Pi box size ?
Both the three π and four π cabinets were designed with the help of PiAlign many years ago. I always went through a design cycle of starting with PiAlign, then double checking with BoxPlot looking for alignment characteristic of all my designs, being sl...
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Forum: Pi Speakers «»
Posted on: Fri, 20 November 2009 15:38 «»
By: Wayne Parham
Re: Studio Pi Speakers variations?
People have made various modifications over the years. Some I think are probably fairly "safe", others not so. The Studio Series are probably OK to modify to some extent, as long as the woofer and tweeter are kept fairly close together and yo...
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Forum: Pi Speakers «»
Posted on: Thu, 17 September 2009 20:55 «»
By: Wayne Parham
Re: Just Loaded in 4 Pis
The reason we made the middle speaker sealed for the university studio was that, as a center channel, purely for aesthetics, it simply looked better to have the tweeter centered. I think sometimes psychoacoustics are as important to listening impression...
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Forum: Pi Speakers «»
Posted on: Mon, 07 September 2009 20:56 «»
By: Wayne Parham
Re: 4-pi box size !!!
Standing waves do have an influence, yes. They don't pass through the cone as much as they provide an acoustic loading for it, similar to the way Helmholtz resonance does. In fact, some speakers use this as a primary tuning mechanism.
Small boxes ha...
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Forum: Pi Speakers «»
Posted on: Sat, 08 August 2009 07:41 «»
By: Wayne Parham
Re: 2-pi tower.
I modeled the two π tower using Martin King's spreadsheets. I paid the license fee specifically to help develop this speaker, since the tower is physically tall and would suffer pipe modes in the passband. The woofer and port positions were chosen so H...
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Forum: Pi Speakers «»
Posted on: Thu, 06 August 2009 14:03 «»
By: Wayne Parham
Re: Pi 7 Plans
As with all things in audio, there are some changes that don't matter much and others that do. In general, small cabinet changes like you're talking about don't usually hurt much as long as the volume and Helmholtz frequency stay the same and the physic...
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Forum: Pi Speakers «»
Posted on: Wed, 10 June 2009 11:58 «»
By: Wayne Parham
Re: 2Pi Towers - potential mods
There are two issues, which I'll describe in more detail below. One is the cabinet size and the other is the position of the port and woofer relative to the cabinet walls. Cabinet size sets Helmholtz frequency, as does port size. That determines bass re...
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Forum: Pi Speakers «»
Posted on: Tue, 12 May 2009 17:14 «»
By: Wayne Parham
Re: 2-Pi tower port size???
If you measure it, you'll find it resonates around 40Hz to 42Hz, somewhere in there. I've seen some Helmholtz calculators that show values a little higher, some a little lower. Mostly I think it's the difference in the area offset, sometimes called "cor...
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