Horizontal or vertical?

dobias · 9th August 2009, 05:19 AM

Using four 3 inch tweeters per side (wired in series-parallel) would they be best in a vertical or horizontal lineup?
Are there any rules as to spacing?
They'll cross over at 7 kHz.

Inductor · 9th August 2009, 09:38 AM

Do you know their dispersion pattern at that frequency?

dobias · 9th August 2009, 02:06 PM

Inductor,
I wish I did, but these are early (1956) Wharfedale Super 3 tweeters. The Wharfedale factory had a massive fire & lost all their records. They also were sold off for the first of many times.
All that's available are SPL/frequency & impedence graphs.
They seem to be about 90dB & my main speaker is 95dB. That's why I wound up with four tweeters per side being needed.
dobias

Inductor · 9th August 2009, 02:39 PM

I didn't know about the Warfedale fire. What year was that. Information is now in China or something (NPI), it should be kept in bunkers. You know, I don't think it is a good idea, having the tweeters next to each other because of phase issues. It's better to have a good one. Since you have them, why don't you try having them in an arc so they don't interfere so much.

dobias · 9th August 2009, 04:32 PM

Inductor,
Thanks for the opinion for a radial (horizontal) arrangement.
The fire isn't mentioned in any of the histories of the Wharfedale company.
I only know of it by contacting Wharfedale for speaker information of the early G.A.Briggs speakers.
dobias

Inductor · 9th August 2009, 08:02 PM

Good one Troels...
Valuable information about other 3"s also included.
http://www.troelsgravesen.dk/super3.htm

(Google 1956 Wharfedale Super 3 tweeters)

Visit for ideas
diyAudio Forums - Visaton FRS8 line array & W170S
Visaton FRS8 line array & W170S

GM · 10th August 2009, 04:26 AM

Quote:

Originally posted by dobias
Using four 3 inch tweeters per side (wired in series-parallel) would they be best in a vertical or horizontal lineup?
Are there any rules as to spacing?
They'll cross over at 7 kHz.

Our hearing is horizontally opposed (ears on ~180 deg apart on the side of our heads), so line arrays should be vertically opposed and due to their size should ideally be limited to < a ~1130 Hz BW and no > a ~4520 Hz BW. Since our phase hearing acuity is so poor up high though, you might can get away with it crossing at 7 kHz.

Line array white paper: http://www.audioroundtable.com/misc/nflawp.pdf

GM

dobias · 11th August 2009, 04:41 PM

Thank you, gentlemen.
The information you've posted for me is appreciated. It was just what I was looking for.
dobias

9th August 2009, 05:19 AM	#1
dobias diyAudio Member Join Date: Jun 2007	Horizontal or vertical? Using four 3 inch tweeters per side (wired in series-parallel) would they be best in a vertical or horizontal lineup? Are there any rules as to spacing? They'll cross over at 7 kHz.

9th August 2009, 09:38 AM	#2
Inductor diyAudio Member Join Date: Feb 2006 Location: Cascais	Do you know their dispersion pattern at that frequency? __________________ What the Hell is this crap?! It's not crap, it's muzak.

9th August 2009, 02:39 PM	#4
Inductor diyAudio Member Join Date: Feb 2006 Location: Cascais	I didn't know about the Warfedale fire. What year was that. Information is now in China or something (NPI), it should be kept in bunkers. You know, I don't think it is a good idea, having the tweeters next to each other because of phase issues. It's better to have a good one. Since you have them, why don't you try having them in an arc so they don't interfere so much. __________________ What the Hell is this crap?! It's not crap, it's muzak.

11th August 2009, 04:41 PM	#8
dobias diyAudio Member Join Date: Jun 2007	Horizontal or vertical? Thank you, gentlemen. The information you've posted for me is appreciated. It was just what I was looking for. dobias

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9th August 2009, 02:06 PM	#3
dobias diyAudio Member Join Date: Jun 2007	Inductor, I wish I did, but these are early (1956) Wharfedale Super 3 tweeters. The Wharfedale factory had a massive fire & lost all their records. They also were sold off for the first of many times. All that's available are SPL/frequency & impedence graphs. They seem to be about 90dB & my main speaker is 95dB. That's why I wound up with four tweeters per side being needed. dobias

9th August 2009, 04:32 PM	#5
dobias diyAudio Member Join Date: Jun 2007	Inductor, Thanks for the opinion for a radial (horizontal) arrangement. The fire isn't mentioned in any of the histories of the Wharfedale company. I only know of it by contacting Wharfedale for speaker information of the early G.A.Briggs speakers. dobias

9th August 2009, 08:02 PM	#6
Inductor diyAudio Member Join Date: Feb 2006 Location: Cascais	Good one Troels... Valuable information about other 3"s also included. http://www.troelsgravesen.dk/super3.htm (Google 1956 Wharfedale Super 3 tweeters) Visit for ideas diyAudio Forums - Visaton FRS8 line array & W170S Visaton FRS8 line array & W170S

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