2 tweeters for vertical dispersion?

Ang · 13th April 2007, 04:33 AM

I've got a stack of neo8's for a line array, and was planning to stick a raven tweeter in the middle of them to handle 7K+.

But given the raven's limited verical dispersion, I was thinking about using 2 (cheaper) neo3 tweeters oriented @ 90 degrees. Would there be any combing effects if I can get these within an inch of each other? Thanks.

Zarathu · 19th April 2007, 12:48 AM

Have you read Jim Griffin's line array paper?

While the B&G's have limited vertical dispersion, they cover the horizontal cylindrical dispersion super. Zapfe rated the cheaper neo3's as better than any of the good domes that he compared them to, and way above the other ribbons and planars he measured.

The key to vertical dispersion is in placing them on top of each other. Use at least a 35 inch line which will cover seated position listening to about someone who is 5'10 inches high. Putting one turned in the middle will not help. The interference of the sound streams will probably cause comb filter distortion that you WOULD NOT have had otherwise.

You could use Dayton ND20FA domes if you cut the flanges. Two 33 inch lines will cost you ABOUT $210. I've done this, and its great, but I have to qualify that my system uses a Rane electronic crossover 24 db/octave L-R slope, and is Tri-amped, so comparisons without these electronics are not really valid.

Zarathu
calipso@epix.net

Ang · 19th April 2007, 05:10 AM

thanks Zarathu, I'll check that out.

Wouldn't a pair of dome tweeters also have this problem as well? i.e. isn't there some point at which sound from them will interfere in the same that from the ribbons will?

13th April 2007, 04:33 AM	#1
Ang diyAudio Member Join Date: Feb 2006 Location: Pittsburgh	2 tweeters for vertical dispersion? I've got a stack of neo8's for a line array, and was planning to stick a raven tweeter in the middle of them to handle 7K+. But given the raven's limited verical dispersion, I was thinking about using 2 (cheaper) neo3 tweeters oriented @ 90 degrees. Would there be any combing effects if I can get these within an inch of each other? Thanks.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Theory in Dunlavys & vertical dispersion..	Virtalahde	Multi-Way	15	4th May 2010 06:13 PM
Remedy for ribbons' limited vertical dispersion??	rick57	Multi-Way	18	23rd February 2007 10:52 PM
speaker dispersion	malcom_xavior	Car Audio	2	14th December 2004 10:23 PM
Two Ribbon tweeters to improve horizontal dispersion?	goldyrathore	Multi-Way	15	31st May 2004 09:10 PM
Baffle width vs dispersion	Vg	Multi-Way	5	13th October 2003 07:34 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

19th April 2007, 12:48 AM	#2
Zarathu diyAudio Member Join Date: Apr 2005 Location: Planet System Vega(I'm a Vegan)	Have you read Jim Griffin's line array paper? While the B&G's have limited vertical dispersion, they cover the horizontal cylindrical dispersion super. Zapfe rated the cheaper neo3's as better than any of the good domes that he compared them to, and way above the other ribbons and planars he measured. The key to vertical dispersion is in placing them on top of each other. Use at least a 35 inch line which will cover seated position listening to about someone who is 5'10 inches high. Putting one turned in the middle will not help. The interference of the sound streams will probably cause comb filter distortion that you WOULD NOT have had otherwise. You could use Dayton ND20FA domes if you cut the flanges. Two 33 inch lines will cost you ABOUT $210. I've done this, and its great, but I have to qualify that my system uses a Rane electronic crossover 24 db/octave L-R slope, and is Tri-amped, so comparisons without these electronics are not really valid. Zarathu calipso@epix.net

19th April 2007, 05:10 AM	#3
Ang diyAudio Member Join Date: Feb 2006 Location: Pittsburgh	thanks Zarathu, I'll check that out. Wouldn't a pair of dome tweeters also have this problem as well? i.e. isn't there some point at which sound from them will interfere in the same that from the ribbons will?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)