| Interesting Article [message #23126] |
Thu, 24 August 2006 04:53  |
FredT
Messages: 704
Registered: May 2009
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Illuminati (1st Degree) |
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Roger Rusell's line array experience. I'm giving away my age when I admit I read the 1961 Popular Electronics article on the Sweet Sixteen and one of my nurdly friends and I built one. It sounded pretty good to us at the time. Of course nobody was concerned about beaming or comb filtering - life was simlper back then.
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| Re: What Would Jim Say? [message #23129 is a reply to message #23128] |
Thu, 24 August 2006 07:20  |
Pinky
Messages: 10
Registered: May 2009
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Chancellor |
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In the pictures, it doesn't look like his dome tweeters are close enough together to prevent audible comb filtering. In my own array, I've taken the little Dayton Neo's and cut the flange off so tightly that the center to center distance is about .80. This raises the calculated comb level to almost or more than 18,000 hz. This is at a range where, a. I cannot hear adequately anymore due to my age, and b. most people will not be able to differentiate the comb hiss from normal musical tones, in my opinion, of course. But in any case, isn't comb filtering always more audible in the midrange levels rather than at tweeter levels above 12,000 hz? Pinky
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| Re: Interesting Article [message #23130 is a reply to message #23126] |
Thu, 24 August 2006 08:45 |
Jim Griffin
Messages: 232
Registered: May 2009
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Master |
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Fred, Thanks for the new Roger Russell URL. The history paper is an excellent review of his work at McIntosh and now in the Mac afterlife. Roger does an excellent writing job. I also find that the new IDS full range driver line array by R. Russell design is essentially what he writes about in his June 2006 Audioxpress article. On the other hand look at the cost of the IDS (more than $16K). Your Selah Audio arrays (and your cabinet work) are a bargain by comparison. Jim
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| Re: Interesting Article [message #23137 is a reply to message #23126] |
Sun, 27 August 2006 21:41 |
lcholke
Messages: 73
Registered: May 2009
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Viscount |
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Hi All, I enjoyed reading Russile's artical. For whats its worth, I made a 4 stack with the Fostex FF85K 3” FULL RANGE driver. They are very fast and are good to about 100hz-150hz. They did sound better with a single cap to reduce the lows. I was trying them out for a 16 high line array project. Comb filtering did not seem to be a problem on the 4 stack. The other driver I tried was the TANG BAND W3-594S (I think the # is correct). The Fostex was much better. I was trying to eliminate the x-over by using a fullrange. After hearing some ribbons tweeters I decided that the fostex was not the way I wanted to go. A 16 stack of those FF85k drivers would be #2 on my speaker list though. I bought the Linus3 array that Rick posted about in July, and am very happy with it. -Linc
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