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130 Search Results Found |
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Forum: Measurement «»
Posted on: Tue, 15 September 2009 19:20 «»
By: Wayne Parham
Re: On axis measurements in nearfield listening
I have found that most folks on the PE forum rarely (or never) do measurements. They trust their models instead. I'm not against models by any means, using them extensively. In fact, I think most people have better results with models than they would ...
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Forum: Speaker «»
Posted on: Tue, 18 August 2009 10:08 «»
By: Wayne Parham
Midhorns and boundary loading
The 9π midbass and midrange horns were designed to work properly in true freespace, flown outdoors. When used indoors, you can usually use a smaller horn.
I've found that horns designed for use below 300Hz are able to get boundary loading in small ro...
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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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Forum: Silicon Valley «»
Posted on: Mon, 30 March 2009 17:27 «»
By: Wayne Parham
Active Sub Crossover
On a lark, I purchased an active subwoofer crossover module a few months back. I was looking at options to plate amps, something that would allow me to use one of my many existing amplifiers with subs. My thinking was that plate amps are fine, but I al...
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Forum: Group Build «»
Posted on: Tue, 10 March 2009 17:44 «»
By: Wayne Parham
Re: Hmmmmm
Passive equalization works by attenuating certain portions of the response curve. So it will reduce output in certain areas. Pete wanted to reduce the octave around 700Hz by a couple decibels, but nowhere else. I don't see any harm in doing that. So ...
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Forum: Speaker «»
Posted on: Mon, 16 February 2009 12:20 «»
By: Wayne Parham
Baffle step and collapsing directivity
I was just in another discussion with some folks that considered baffle step correction a mandatory step in crossover design. I don't dismiss it entirely, but I do think it is sometimes given too much emphasis. Another thing I noticed is that these peop...
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Forum: Pi Speakers «»
Posted on: Mon, 02 February 2009 16:17 «»
By: Wayne Parham
Re: Pi Three or Two Tower - suggestions Wayne please?
Both are great speakers, and both work very nicely on tube amps. Each has its strengths and weaknesses.The two π tower has a small footprint, low cost and deep extended bass. It is a smooth sounding speaker that is popular with just about everyone. It ...
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Forum: Pi Speakers «»
Posted on: Mon, 02 February 2009 13:02 «»
By: Wayne Parham
Re: What's your favorite horn and crossover for the DE250?
I like the Eminence H290 90°x40° horn, and especially my own π wood horn. It has a straight sides, radiused to match the throat entry angle like an oblate spheroid or quadratic horn. The mouth is radiused too, to eliminate any sharp edges. This reduce...
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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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