View Full Version : sonotube port with flare?

12-16-2009, 07:57 AM
if i was to use a sonotube for a port (like a 18" or bigger for a 4th order wall) how would i make a flare that big? any ideas?

12-16-2009, 08:04 AM
a flare along the lines of this: http://www.google.com/imgres?imgurl=http://vincent.brient.free.fr/fichiers/tractrix150radian.jpg&imgrefurl=http://vincent.brient.free.fr/round_horns.htm&usg=__yl0-Lw7LBe_uf1xOOsJLDL_U5G8=&h=605&w=640&sz=51&hl=en&start=10&tbnid=gpKqQRNRoeObYM:&tbnh=130&tbnw=137&prev=/images%3Fq%3Dtractrix%26hl%3Den

12-16-2009, 12:44 PM
pvc heatgun and a bowl, or you could take a razor cut your wrists drain some of the jewish blood out and buy some 6'' aeroports.

12-16-2009, 12:46 PM
Maybe try some fiberglass?

12-16-2009, 01:00 PM
pvc heatgun and a bowl, or you could take a razor cut your wrists drain some of the jewish blood out and buy some 6'' aeroports.

im talking about more than a 6" port ******.

im talking one big aero, as in like 20" in diameter in the center of my wall

PV Audio
12-16-2009, 01:06 PM
What in God's ****ing name would require a 20" port, let alone a flared one?

And that is not a port in that picture, that's a tractrix horn which is a type of speaker enclosure.

12-16-2009, 01:07 PM
that pic looked like that flare was made on a lathe

12-16-2009, 01:28 PM
it wasnt made on a lathe, it was made with a ton of circles cut out of wood lol.

yea i know thats a tractrix horn

ill PM u PVaudio.

12-16-2009, 01:38 PM
i would build it out of wood frame and glass it, really does not need to super strong, so resin the fleece and put 3-4 layers of glass on the out side (side you would not see, it would be inside the box) then a thin coat of bondo on the visible side to make it smooth... couple hours - done.

12-16-2009, 02:26 PM
I build 8" aeros, tonight im building 6's with bigger radius than PSP.www.audible-engineering.com. after that 8's with bigger radius than my current ones, and after that- 10's.

PV Audio
12-16-2009, 05:37 PM

How is this possibly flared enough to be considered an aero? It's a straight port with a rounded lip.

12-16-2009, 05:47 PM
i'm building one currently kinda like the process of the tractrix horn..i'll post pics when i get the chance but you could go that route...build the flare out of 1/4 or 1/2 mdf pieces stacked like you posted...then glass it...it's what i'm doin
thought i was being original till you posted that..:p:

da box king
12-16-2009, 05:48 PM
try an hvac supply house. They use flares and dampers for some large ducts