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Re: 4 pi, oh my! [message #66243 is a reply to message #66242]

Mon, 21 February 2011 19:07

Wayne Parham
Messages: 18677
Registered: January 2001

Illuminati (33rd Degree)

They're a very easy load for tube amps. High efficiency and benign impedance curve. Perfect for tubes.

They are intended to be built and used in mirror images. This is mostly for aesthetics but there is a very small oblique tilt in the position of the forward lobe and the upper and lower nulls. For that reason, I generally suggest the tweeters be outboard. That way the upper null is slightly to the outside and the lower null is slightly to the inside. But it's so slight, it really doesn't matter.

Stands are according to personal preference, but I generally like to suggest that stands be limited to small risers if subs aren't used. This helps reduce floor bounce by keeping the midwoofer/floor distance small. On the other hand, this speaker really works best when used with subs, and in that case, I like to use stands about 9-15 inches. This puts the center of the forward lobe right at listening height. The subs should be blended with the mains, which smoothes room modes, including floor bounce. More about that in the document below:

High-Fidelity Uniform-Directivity Loudspeakers

http://lonestaraudiofest.com/2009/Photos/PiSpeakers_10.jpg

http://lonestaraudiofest.com/2009/Photos/PiSpeakers_06.jpg

http://lonestaraudiofest.com/2009/Photos/PiSpeakers_02.jpg

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[Message index]

		4 pi, oh my! By: EL Jack on Mon, 21 February 2011 18:14
		Re: 4 pi, oh my! By: Wayne Parham on Mon, 21 February 2011 19:07
		Re: 4 pi, oh my! By: EL Jack on Mon, 21 February 2011 19:38
		Re: 4 pi, oh my! By: Matts on Mon, 21 February 2011 22:41
		Re: 4 pi, oh my! By: EL Jack on Tue, 22 February 2011 12:48
		Re: 4 pi, oh my! By: Wayne Parham on Tue, 22 February 2011 13:53
		Re: 4 pi, oh my! By: Bill Epstein on Tue, 22 February 2011 17:10
		Re: 4 pi, oh my! By: steve f on Wed, 23 February 2011 02:41
		Re: 4 pi, oh my! By: Bill Epstein on Wed, 23 February 2011 08:45
		Re: 4 pi, oh my! By: Wayne Parham on Wed, 23 February 2011 14:25
		Re: 4 pi, oh my! By: Matts on Wed, 23 February 2011 14:45
		Re: 4 pi, oh my! By: EL Jack on Wed, 23 February 2011 09:55
		Re: 4 pi, oh my! By: Bill Epstein on Wed, 23 February 2011 21:29
		Re: 4 pi, oh my! By: Matts on Tue, 22 February 2011 17:09
		Re: 4 pi, oh my! By: Psychoacoustic on Wed, 23 February 2011 21:45
		Re: 4 pi, oh my! By: Doc Jr 8156 on Thu, 24 February 2011 22:05
		Re: 4 pi, oh my! By: vinylvalet on Mon, 29 August 2011 08:56
		Re: 4 pi, oh my! By: Wayne Parham on Mon, 29 August 2011 09:57
		Re: 4 pi, oh my! By: vinylvalet on Tue, 30 August 2011 08:21
		Re: 4 pi, oh my! By: Wayne Parham on Tue, 30 August 2011 08:43
		Re: 4 pi, oh my! By: vinylvalet on Tue, 30 August 2011 09:29
		Re: 4 pi, oh my! By: Wayne Parham on Tue, 30 August 2011 13:10

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