| Affect of speaker in front of speaker [message #24213] | 
			Thu, 13 March 2008 14:20   | 
		 
		
			
				
				
				
					
						  
						Brad
						 Messages: 8 Registered: May 2009 
						
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					Esquire  | 
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I was wondering what everyone’s thoughts are about the affect of having a long ribbon, planer (newform, BG) in front of mid/bass speakers.  I was thinking of trying an array of RS150s with a long ribbon or multiple small ribbons directly in front of the mid/bass.  Picture an array of  BG PD-6CSIs.  What affect on the mid/bass will the ribbons being in front of them.  Is there a frequency where the affect would no longer be unnoticeable?  Say if the width were less then the wavelength would this be OK.  The BG planers are 1.5” wide, this is a frequency of well above 8k.  The Neo 3s are a little over 2.5” wide, a feequency of 5khz is 2.7” long. 
 
		
		
		
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			| Re: Affect of speaker in front of speaker [message #24215 is a reply to message #24214] | 
			Fri, 14 March 2008 12:40    | 
		 
		
			
				
				
				
					
						  
						Broncosaurs
						 Messages: 1 Registered: May 2009 
						
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					Esquire  | 
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Marlboro, yes I have read Dr. Griffins paper.  I think sometimes I have read it a few to many times.  I might not have made it clear of what I was thinking.  I don't want to do an array of the BG 6es I was trying to describe the idea of the tweeter in front of the mid/bass.  I did some more looking around the web and found this: http://www.bgcorp.com/radia.php This idea but using a Newform or BG Planer or an array of bg neo 3 but way closer together then the link above.  I was looking for information on the affect of the tweeter in front of the mid/bass.  I would guess there is going to be a frequency  output of the mid/bass to width of tweeter that should not be exceeded.  
  
		
		
		
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			| Re: Affect of speaker in front of speaker [message #24242 is a reply to message #24213] | 
			Thu, 27 March 2008 17:07   | 
		 
		
			
				
				
				
					
						  
						Rick Craig
						 Messages: 115 Registered: May 2009 
						
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					Viscount  | 
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SLS has a commercial array design that has planar tweeters in front of the woofer. I would be inclined to say it's not the best approach but I've never tried doing that. You might try measuring the effects with a few drivers and see if it works for you. If not, at least you won't be out of a large sum of money. 
 
		
		
		
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