sonotube port with flare?

[orangecounty1 10+ year member]

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?

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[orangecounty1 10+ year member]

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

 

[Thewes 10+ year member]

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.

 

[Mookie 10+ year member]

Maybe try some fiberglass?

 

[orangecounty1 10+ year member]

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 5,000+ posts]

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.

 

[Savag3 10+ year member]

that pic looked like that flare was made on a lathe

 

[orangecounty1 10+ year member]

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.

 

[BassMechkanic 10+ year member]

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.

 

[amartin_72]

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 5,000+ posts]

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

 

[mbrooky 10+ year member]

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..//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[da box king 10+ year member]

try an hvac supply house. They use flares and dampers for some large ducts