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Re: So you are saying [message #17603 is a reply to message #17598]

Mon, 28 February 2005 11:36

Earl Geddes
Messages: 220
Registered: May 2009

Master

First I ballpark the design by calculating what a 15" piston directivity would be and what a waveguide should be to match at 90°. Then I set up the system and measure the complete polar response of both drivers in the actual enclosure. Finally a crossover is designed and optimized with a computer program that I wrote to give the flatest response over all angles in the forward 90° arc, with a slight preference for 22.5° (the direct angle).

Finally, of course, the crossovers and systems are tested at all polar angles (these results are shown on my web site). I have never seen a situation where the measurements and computer predictions were not the same, so this last step is a simple confirmation.

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[Message index]

		Distortion mechanisms By: Wayne Parham on Wed, 23 February 2005 15:41
		Re: Distortion mechanisms By: Mike.e on Wed, 23 February 2005 18:05
		Re: Distortion mechanisms By: Earl Geddes on Wed, 23 February 2005 19:17
		Clarification By: Mike.e on Thu, 24 February 2005 14:08
		Re: Clarification By: Earl Geddes on Thu, 24 February 2005 14:52
		Re: Clarification By: Mike.e on Sat, 26 February 2005 23:45
		Re: Clarification By: Earl Geddes on Sun, 27 February 2005 11:00
		Re: Clarification By: Mike.e on Sun, 27 February 2005 20:29
		Re: Clarification By: Earl Geddes on Thu, 24 February 2005 15:07
		So you are saying By: akhilesh on Fri, 25 February 2005 14:11
		Re: So you are saying By: Earl Geddes on Fri, 25 February 2005 14:39
		Re: So you are saying By: akhilesh on Mon, 28 February 2005 08:14
		Re: So you are saying By: Earl Geddes on Mon, 28 February 2005 08:49
		Re: So you are saying By: akhilesh on Mon, 28 February 2005 10:51
		Re: So you are saying By: Earl Geddes on Mon, 28 February 2005 11:36
		Thanks Wayne & Earl By: akhilesh on Mon, 28 February 2005 14:34
		DI matching By: Wayne Parham on Mon, 28 February 2005 13:46
		Re: So you are saying By: Mark Seaton on Mon, 28 February 2005 10:52
		Re: So you are saying By: Earl Geddes on Mon, 28 February 2005 11:29
		I checked up Floyd Toole's work By: akhilesh on Mon, 28 February 2005 11:12
		Re: I checked up Floyd Toole's work By: Earl Geddes on Mon, 28 February 2005 11:42
		CD versus H/LD By: akhilesh on Mon, 28 February 2005 14:32
		Re: CD versus H/LD By: Earl Geddes on Mon, 28 February 2005 14:54
		Re: CD versus H/LD By: akhilesh on Mon, 28 February 2005 15:49
		Re: CD versus H/LD By: Earl Geddes on Mon, 28 February 2005 15:58
		Re: CD versus H/LD By: Earl Geddes on Mon, 28 February 2005 15:52
		Re: CD versus H/LD By: akhilesh on Mon, 28 February 2005 16:23
		Hey, I just saw your website By: akhilesh on Mon, 28 February 2005 11:24
		Re: Distortion mechanisms By: Manualblock on Wed, 23 February 2005 19:10
		Re: Distortion mechanisms By: Wayne Parham on Wed, 23 February 2005 19:33
		Re: Distortion mechanisms By: akhilesh on Thu, 24 February 2005 12:42
		Re: Distortion mechanisms By: Wayne Parham on Thu, 24 February 2005 13:16
		my rant By: pgolde on Fri, 25 February 2005 13:56
		And what about tubes ? By: Eric Mainardi on Wed, 02 March 2005 04:51
		Re: And what about tubes ? By: Wayne Parham on Wed, 02 March 2005 13:23
		Best of both worlds By: wunhuanglo on Thu, 03 March 2005 02:30
		Another link By: akhilesh on Thu, 03 March 2005 05:59
		Some useful links By: Eric Mainardi on Fri, 04 March 2005 02:38
		Re: Some useful links By: Wayne Parham on Fri, 04 March 2005 02:59

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