First pictures of my mid-bass horn, painted

angeloitacare · 18th June 2008, 05:41 PM

hi

today my first midbass horn got ready. It is painted with poliurethan PU, black satin , which leaves a raw surface.

mouth size is 38" / 96cm diameter, and thorat 4" /10cm.

Weight is approximately 130kg.

Fc is 145hz, and 125hz at half space.

I will use it between 150hz and 700hz, with Fane Studio 8M driver,
in my next hornspeaker system, full frontloaded, 4 way.

Angelo

more pictures at : Audio Voice Acoustics forum

Fast1one · 18th June 2008, 05:57 PM

Dear Lord....beautiful work sir

steve71 · 18th June 2008, 06:20 PM

Truly stunning work! Did you turn that monster on a lathe?

angeloitacare · 18th June 2008, 06:39 PM

hi Steve

yes, these horns are made on a big wood lathe.

you can see more pictures at my blog

Youtube videos : Turning MDF Tractrix Horns

Magnetar · 18th June 2008, 09:45 PM

!!!

steve71 · 18th June 2008, 11:48 PM

Quote:

Originally posted by angeloitacare
hi Steve

yes, these horns are made on a big wood lathe.

you can see more pictures at my blog

Youtube videos : Turning MDF Tractrix Horns

Thanks, those vids were interesting to watch. Wish I had a big lathe like that to play with, but on the other hand I'd probably end up hurting myself.

How are you matching the dispersion of the two horns at 700hz? Do the polar plots match up due to both horns having the same expansion profile?

agent.5 · 19th June 2008, 12:43 AM

Quote:

Originally posted by angeloitacare

with Fane Studio 8M driver,
, full frontloaded, 4 way.

Looks like you have been cat-ed.

angeloitacare · 19th June 2008, 02:39 AM

hello Steve

this is actually , something i am thinking about. One of the main criteria was to place all drivers vertically on axis, to avoid time delay. The mid-bass horn has tractrix expansion. The main goal for the midrange horn is to get the lowest possible coloration. But the coherence of the whole system is important as well. I would like to use a different shape than tractrix for the midrange horn. Maiby something in the middle, between oblate spheroid , and tractrix, with rounded edges, to avoid diffraction . A little bit of both worlds. A flare, that alouds to load down to 700hz, with a mouth size not bigger than 23". I don't know however, if that will create differences in the imaging. If i would use the midrange horn tractrix as well, than certainly there would be no mismatch between the two horns.

with Fane Studio 8M driver, full frontloaded, 4 way Looks like you have been cat-ed.

it seems there is sort of consensus that it is a good driver for mid-bass horn loading. It is a good starting point for me. I will in the future, however, certainly try out also other drivers.

Angelo

JoshK · 19th June 2008, 02:59 AM

Muito bem!

Holy crap those look heavy. When do you want to get started on mine?

magentawhale · 19th June 2008, 08:54 PM

Highly impressive - I have been watching your vids on Youtube. Shouldn't you wear respirators during the lathing process and, especially, the sanding, though?

18th June 2008, 05:41 PM	#1
angeloitacare diyAudio Member Join Date: Sep 2006	First pictures of my mid-bass horn, painted hi today my first midbass horn got ready. It is painted with poliurethan PU, black satin , which leaves a raw surface. mouth size is 38" / 96cm diameter, and thorat 4" /10cm. Weight is approximately 130kg. Fc is 145hz, and 125hz at half space. I will use it between 150hz and 700hz, with Fane Studio 8M driver, in my next hornspeaker system, full frontloaded, 4 way. Angelo more pictures at : Audio Voice Acoustics forum

19th June 2008, 02:39 AM	#8
angeloitacare diyAudio Member Join Date: Sep 2006	dispertion matching hello Steve this is actually , something i am thinking about. One of the main criteria was to place all drivers vertically on axis, to avoid time delay. The mid-bass horn has tractrix expansion. The main goal for the midrange horn is to get the lowest possible coloration. But the coherence of the whole system is important as well. I would like to use a different shape than tractrix for the midrange horn. Maiby something in the middle, between oblate spheroid , and tractrix, with rounded edges, to avoid diffraction . A little bit of both worlds. A flare, that alouds to load down to 700hz, with a mouth size not bigger than 23". I don't know however, if that will create differences in the imaging. If i would use the midrange horn tractrix as well, than certainly there would be no mismatch between the two horns. with Fane Studio 8M driver, full frontloaded, 4 way Looks like you have been cat-ed. it seems there is sort of consensus that it is a good driver for mid-bass horn loading. It is a good starting point for me. I will in the future, however, certainly try out also other drivers. Angelo

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18th June 2008, 05:57 PM	#2
Fast1one diyAudio Member Join Date: Sep 2006	Dear Lord....beautiful work sir

18th June 2008, 06:20 PM	#3
steve71 diyAudio Member Join Date: Nov 2007	Truly stunning work! Did you turn that monster on a lathe?

18th June 2008, 06:39 PM	#4
angeloitacare diyAudio Member Join Date: Sep 2006	hi Steve yes, these horns are made on a big wood lathe. you can see more pictures at my blog Youtube videos : Turning MDF Tractrix Horns

18th June 2008, 09:45 PM	#5
Magnetar Banned Join Date: Feb 2004 Location: Portal 2012	!!!

19th June 2008, 02:59 AM	#9
JoshK diyAudio Member Join Date: May 2004 Location: Toronto, ON	Muito bem! Holy crap those look heavy. When do you want to get started on mine?

19th June 2008, 08:54 PM	#10
magentawhale diyAudio Member Join Date: Jan 2007 Location: Netherlands	Highly impressive - I have been watching your vids on Youtube. Shouldn't you wear respirators during the lathing process and, especially, the sanding, though?

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