spiral PVC horn fostex 108 sigma

rtlbuilder · 21st April 2006, 06:37 PM

spiral PVC horn fostex 108 sigma

hello fanatics,
Here is a horn I built from pvc elbows using the fostex 108sigma drivers. They sound great but probably could use some adjustments.
I built them using trial and error.

web site: http://tpluspod.com/rtl/fostex%20PVChorn.html

plus these I started working on after the PVC

link: http://tpluspod.com/rtl/fostex%20geodesic%20horn.html

Contrary to what some people think, the PVC horns where developed prior to seeing certain web sites.
When there were less of these types of sites available to peruse.
There are plenty of creative people out here, those familiar with designing know similar ideas often arise independantly. I don't think any one person has a monopoly on creativity.

rtlbuilder

Ropie · 21st April 2006, 08:08 PM

An excellent looking set up.

And i do like your Buckminster-Fuller-horns!

loninappleton · 22nd April 2006, 04:40 AM

Yes I was attracted to this right away.

See the post below a bit for the professional (not my)
evaluation by GM.

He is saying that the line (number of swirls) can be
reduced to comply with transmission line theory.

Your nautilus is a straight pipe or TL and the
driver specs dictate the actual length of the line.

I would call this design the Rams Horn or Shofar
because, as the other post points out, the Nautilus
is a different design concept (has a closed end.)

Lots of room for experimentation I would say. It's
very sculptural and I wisht I had thought of curling up
my PVC pipes which are sort of idle right now with
RS 1197's in them.

21st April 2006, 06:37 PM	#1
rtlbuilder diyAudio Member Join Date: Dec 2003 Location: nyc, ny	spiral PVC horn fostex 108 sigma spiral PVC horn fostex 108 sigma hello fanatics, Here is a horn I built from pvc elbows using the fostex 108sigma drivers. They sound great but probably could use some adjustments. I built them using trial and error. web site: http://tpluspod.com/rtl/fostex%20PVChorn.html plus these I started working on after the PVC link: http://tpluspod.com/rtl/fostex%20geodesic%20horn.html Contrary to what some people think, the PVC horns where developed prior to seeing certain web sites. When there were less of these types of sites available to peruse. There are plenty of creative people out here, those familiar with designing know similar ideas often arise independantly. I don't think any one person has a monopoly on creativity. rtlbuilder __________________ rtlbuilder

21st April 2006, 08:08 PM	#2
Ropie diyAudio Member Join Date: Jul 2003 Location: SW London	An excellent looking set up. And i do like your Buckminster-Fuller-horns! __________________ "A squid eating dough in a polyethylene bag is fast and bulbous, got me?"

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22nd April 2006, 04:40 AM	#3
loninappleton diyAudio Member Join Date: Feb 2004 Location: Appleton, WI	Yes I was attracted to this right away. See the post below a bit for the professional (not my) evaluation by GM. He is saying that the line (number of swirls) can be reduced to comply with transmission line theory. Your nautilus is a straight pipe or TL and the driver specs dictate the actual length of the line. I would call this design the Rams Horn or Shofar because, as the other post points out, the Nautilus is a different design concept (has a closed end.) Lots of room for experimentation I would say. It's very sculptural and I wisht I had thought of curling up my PVC pipes which are sort of idle right now with RS 1197's in them.