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Re: Lobes and nulls, crossover phase and baffle spacing [message #61478 is a reply to message #61477]

Thu, 26 November 2009 21:37

Wayne Parham
Messages: 18789
Registered: January 2001

Illuminati (33rd Degree)

The three π loudspeaker has vertical nulls around 1.2kHz which are narrow bandwidth notches, fully out by 1.0kHz at the bottom and 1.5kHz up top. They only occur at fairly wide vertical angles, like you saw in the video, around +/- 30° from a midpoint between woofer and tweeter. The tweeter's vertical pattern is only +/- 20° from about 2.5kHz up, so the nulls are well outside the desired coverage angle and sort of punctuate the vertical pattern down low.

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[Message index]

		DI-matched two-way loudspeakers By: Wayne Parham on Mon, 23 November 2009 14:38
		Re: Lobes and nulls, crossover phase and baffle spacing By: Norris Wilson on Wed, 25 November 2009 02:14
		Re: Lobes and nulls, crossover phase and baffle spacing By: Matts on Wed, 25 November 2009 09:23
		Re: Lobes and nulls, crossover phase and baffle spacing By: Wayne Parham on Thu, 26 November 2009 19:40
		Re: Lobes and nulls, crossover phase and baffle spacing By: Wayne-o on Thu, 26 November 2009 20:47
		Re: Lobes and nulls, crossover phase and baffle spacing By: Wayne Parham on Thu, 26 November 2009 21:37

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