3 way spatially aligned voice coils

leo vendramini · 23rd January 2010, 08:48 PM

To all DIY speaker freaks. Spacially align any 3 way speakers so the voice coils are all equidistant.Draw an equilateral triangle,each point will the centre of a driver.Using a compass,draw 2 circles at each point 1 outer dia and 1 inner.The size of the triangle will be determined by driver dia.The woofer frame will touch the midrange frame (usually larger) whilst the tweeter will be slightly seperated.See the final diagram as a 3 spoked wheel and position it on the baffle allowing your intuition to determine witch way you would like to rotate the 3 drivers before cutting the holes. Time align the coils if you have the patience.This is a wonderful method that came through divine inspiration to recreate What Lowther and Tannoy are doing. The system also allows you to use First Order networks. The final sound is so close to perfection becaust the science behind it is by it`s very nature,quite perfect. Cheers Leo.

leo vendramini · 24th January 2010, 12:16 AM

PS I forgot to mention the obvious. This configuration is all about Point Source Radiation,thus the sound "eminates" from the center of the triangle. Cheers Leo

head_unit · 29th January 2010, 11:02 PM

er, a picture or diagram might help. Sounds interesting but I just can't quite picture this in my head.

DcibeL · 29th January 2010, 11:11 PM

I also have no idea what you are trying to describe, or how it affects the ability to use a first order filter. Please do explain with images.

Inductor · 29th January 2010, 11:45 PM

Quote:

Originally Posted by leo vendramini

... that came through divine inspiration

It always works when you lack measuring equipment... I prefer calling it intuition.

picowallspeaker · 29th January 2010, 11:47 PM

I think that also using three -or more- speakers of the same type- in whatever manner they might heavenly cooperate - would be simpler in achieving the right results..

Right

?!

Inductor · 30th January 2010, 12:01 AM

Quote:

Originally Posted by picowallspeaker

I think that also using three -or more- speakers of the same type- in whatever manner they might heavenly cooperate - would be simpler in achieving the right results..

Right

?!

No, because the tweeter does not work like that. It depends on the frequency and distance to the other driver for phase, etc., so it usually is closer too and not in a distance dictated by the basket diameter of the woofer.

Iain McNeill · 30th January 2010, 12:28 AM

So instead of three speakers in a vertical line, they are in a triangle pattern?

This will result in comb filtering over crossover regions in both horizontal and vertical planes rather than only in horizontal plane with standard vertical alignment. Especially with 1st order XO and it's 4 octave crossover region, not to mention phase error.

I would guess the sweet spot would be vanishingly small.

But try it, you never know how it'll sound til you try.

Brett · 30th January 2010, 02:05 AM

Quote:

Originally Posted by leo vendramini

Spacially align any 3 way speakers so the voice coils are all equidistant.

The voice coils are not the acoustic centre of the driver.

smokinghot · 30th January 2010, 05:56 AM

Quote:

Originally Posted by Brett

The voice coils are not the acoustic centre of the driver.

I thought it was where the voice coil attaches to the cone...?

23rd January 2010, 08:48 PM	#1
leo vendramini diyAudio Member Join Date: Dec 2009 Location: Preston	3 way spatially aligned voice coils To all DIY speaker freaks. Spacially align any 3 way speakers so the voice coils are all equidistant.Draw an equilateral triangle,each point will the centre of a driver.Using a compass,draw 2 circles at each point 1 outer dia and 1 inner.The size of the triangle will be determined by driver dia.The woofer frame will touch the midrange frame (usually larger) whilst the tweeter will be slightly seperated.See the final diagram as a 3 spoked wheel and position it on the baffle allowing your intuition to determine witch way you would like to rotate the 3 drivers before cutting the holes. Time align the coils if you have the patience.This is a wonderful method that came through divine inspiration to recreate What Lowther and Tannoy are doing. The system also allows you to use First Order networks. The final sound is so close to perfection becaust the science behind it is by it`s very nature,quite perfect. Cheers Leo.

29th January 2010, 11:11 PM	#4
DcibeL diyAudio Member Join Date: May 2003 Location: Saskatchewan	I also have no idea what you are trying to describe, or how it affects the ability to use a first order filter. Please do explain with images. __________________ The power of Science compels you!

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24th January 2010, 12:16 AM	#2
leo vendramini diyAudio Member Join Date: Dec 2009 Location: Preston	PS I forgot to mention the obvious. This configuration is all about Point Source Radiation,thus the sound "eminates" from the center of the triangle. Cheers Leo

29th January 2010, 11:02 PM	#3
head_unit diyAudio Member Join Date: Feb 2004 Location: Los Angeles	er, a picture or diagram might help. Sounds interesting but I just can't quite picture this in my head.

29th January 2010, 11:47 PM	#6
picowallspeaker diyAudio Member Join Date: Apr 2007	I think that also using three -or more- speakers of the same type- in whatever manner they might heavenly cooperate - would be simpler in achieving the right results.. Right ?!

30th January 2010, 12:28 AM	#8
Iain McNeill diyAudio Moderator Join Date: Oct 2007 Location: Santa Cruz, California	So instead of three speakers in a vertical line, they are in a triangle pattern? This will result in comb filtering over crossover regions in both horizontal and vertical planes rather than only in horizontal plane with standard vertical alignment. Especially with 1st order XO and it's 4 octave crossover region, not to mention phase error. I would guess the sweet spot would be vanishingly small. But try it, you never know how it'll sound til you try.

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