DIY tractrix horn (Off Topic)

by Ivo, Saturday, March 04, 2006, 19:43 (6599 days ago) @ p314

Hi Peter,

what kind of "builders foam" do you use?

We call it PUR-foam, the can says isolation foam. It's sort of pale yellow.

I wonder whether I should do the
same with the inside of my Audiovector replica horns and would like to
know whether there are any points to take care of when doing this.

Well, I wouldn't. At least not just like that. An Audiovector is a beautiful horn and lots of work to make. Foaming them would be irreversible. It's makes a very good (or bad...) sticky connection to the horn. What if you don't like the results or would like to try something new?

Maybe you could put a plastic garbage bag in first and spray the foam into that. The foam will expand and still press against the horn walls, but if you want to remove it, it will come out cleanly.

I really hate irreversible mods on expensive or difficult things. :wink:

How heavy are the horns and what size do they have?

I don't know the exact weight, but it clearly weighs less than a 2 liter plastic bottle of milk, so less than 2 kilograms.

They are 61cm x 61cm, and about 40 cm deep, without the drivers. There is no backchamber, I like the balance as it is. I think I will cover the room walls behind with the same damping materials you would use in a backchamber.

Ivo

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