Acoustic Horn Design – The Easy Way (Ath4)

[mabat]

Originally Posted by TNT

What will you do to backside of the round-over? What thickness in general are you going for using this sand? Sand & epoxi?

The back side stays as you see it, it's really not critical. Or what do you mean?
They told me they need at least 10 - 12 mm for a part like this not to break during manipulation (to be sure it doesn't).

[kessito]

On the website of the snail enclosure speakers it is stated that they finish with a special layer because else the material is too brittle, are you aware of this? And have you gotten info from the manufacturing company about the possibillities to make the material less brittle?

I can imagine that some sort of epoxy coating could be applied, maybe sprayed on.

[mabat]

Sure, as I already said, it will be impregnated with epoxy resin. They said it's like stone then. Only during the initial manipulation it may be prone to breaking if too thin.

[kessito]

Ah sorry, missed that info , thanks, looking forward to the results!

[TNT]

It's a little hard to see - on one picture it looks like its "filled" - like if you would place it with the mouth down on a table and fill water in it to become like a ring shaped pond.

But maybe its 12 mm everywhere?

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[mabat]

Yes, that's how it is - "filled". It may be more than 30 mm on average as it is now.

[TNT]

OK!

So gedlee, do we need to polish the inside of a horn/wg or it will sound "course"...?

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[mabat]

... (yeah, it's a bit hard to see)

[TNT]

glossy, glossy

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[mabat]

I believe it could be made glossy