FE168E Sigma teardrop enclosure

[barackuda]

yes I do, the outside is a teardrop, the inside is a sphere with a cone at the back. look here:
(the top is after filler inside and shaping the outside, the bottom is raw rings without shaping)

 

[stereodude27]

Good. I didn't want you to make the same mistake I would have made.

It just didn't look like the thickness was correct approaching the funnel.

I know you are using filler but what type have you settled on regular Bondo or a type with some fiber embedded?

 

[barackuda]

stereodude27:
no decided yet, will be buying filler next week. you have any suggestion? remember, i am in europe (Sicilli, Catania right now)...
the enclosure wont be transmitting any low notes, so i think any filler should suffice.

Danny

 

[barackuda]

more assembly
still a lot of small ring to cut

 

[Godzilla]

Cool. I hope this works out.

 

[stereodude27]

stereodude27:
no decided yet, will be buying filler next week. you have any suggestion? remember, i am in europe (Sicilli, Catania right now)...
the enclosure wont be transmitting any low notes, so i think any filler should suffice.

Danny

I have no idea what kind of filler is available overseas. My first choice would be a marine epoxy.
If not, then I would suggest making friends with an auto body repair shop. They can possibly suggest something.


Cool build though.

 

[bigfishe]

Being in the biz i would say the cheapest bondo you can find.Then prime with the good stuff Dupont or PPG. Oh are you going to smooth the inside?

 

[bigfishe]

I would just line the inside with Fiberglass resin real good to help seal it up.Otherwise you will see where the wood was bonded .

 

[barackuda]

bigfishe:
yes, smoothing the inside with some cheap filler, then line with epoxy as you suggested.
The outside will be smoothed out on a lathe, then of course filler. But I will give it to professionals in painting business.
or I hope I will ))
perhaps I will have a go on my own. And you two part filler (usually used on car bodies)

Danny

 

[bigfishe]

Good luck curves are a pain to do.Better to send it out.

 

[barackuda]

bigfishe:
me think so....professionals will finish the piano white

 

[bigfishe]

Man if you were closer I would paint it for you.
There is nothing like automotive paint on speakers NOTHING!!!

 

[barackuda]

bigfishe
its just about 7 000 miles....that's nothing
I am thinking some beautiful pearl white (to please the wife).
cuttings come a long slowly, couple of rings per couple of days (work does not permit)
anyway, should make some update during the weekend (working weekend )

Danny

 

[barackuda]

coming along slowly....
but I think pics are always good

 

[bernardodda]

congratulations, great project..
just an idea instead of filling inside, why don't you cut a little bit the rings on the inside so you don't have to use so much filler? these way you could get more wood properties on the sound...

 

[barackuda]

bernardodda:
I want to line the inside with Dynamat (or similar) produkt so there is no need for really smooth surface. the dynamat has significant thicknes, what you suggest is a good idea, but labor intensive. and there is not that much time in my busy schedule...
but please keep the ideas flowing

 

[barackuda]

hello everybody, update time:

The tom shells are done, the rough part anyway. next week i take them to a workshop for final shape turning. then off to painting. Stainless steel back end tubes are done, Delta 12 LF drivers ordered for the FAST part of the speaker.
I will post some pics of the shells when i get to hotel.

Danny

 

[barackuda]

picture as promised. the black circles are laser cut, i had to rework a couple
next time i use only laser cut pieces.

Danny

 

[barackuda]

oh yes... I forgot, the final design... driver will be Delta 12 LF in 100L vented.

 

[xrk971]

Nice work Barakuda. What about making teardrop out of ceramic or clay with potters wheel? What if you could find similar vase in store and modify? Of course it won't have profile to match B&W. The shape is really to prevent any back reflections like a semi infinite tube, not sure if exact profile is critical, volume probably more important.