meagain Posted May 15, 2007 Share Posted May 15, 2007 C - do you have pics of the raw material? Quote Link to comment Share on other sites More sharing options...
michael hurd Posted May 16, 2007 Share Posted May 16, 2007 Could also use multiple layers of veneer instead of the cardboard.... Quote Link to comment Share on other sites More sharing options...
consistent Posted May 16, 2007 Author Share Posted May 16, 2007 G'day My first and third picture shows the raw material in action front and back. The front is white (has a flat coating) the back just like cardboard but has a low sheen \\ Cheers Quote Link to comment Share on other sites More sharing options...
consistent Posted May 16, 2007 Author Share Posted May 16, 2007 Yep, sure can. I think if one experimented there is a potential to find a number of 'workable' materials that would do the job. Cheers Quote Link to comment Share on other sites More sharing options...
seti Posted May 16, 2007 Share Posted May 16, 2007 Yep, It was from an old thread I think ALK and a few others contributed to. I did up my templates based on them. Originally it came out of Bruce Edgars calcs and ideas for a 2" lens. Al has some pics on his website. Also recently there was a thread on a magnificent pair being built...I can't remember who it was I'll have to do a search. My system recently died and I lost a lot of info and am now using Open Source (Suse) rather than Windows and just starting to find my way around. Cheers I really like SuSE great Linux distro. Quote Link to comment Share on other sites More sharing options...
formica Posted May 16, 2007 Share Posted May 16, 2007 Pretty good example of the KISS principal... great thinking... ROb Quote Link to comment Share on other sites More sharing options...
jorjen Posted May 19, 2007 Share Posted May 19, 2007 I built these 2" 300 hz. horns using 3/8" bendable plywood. Not bad stuff, but next time I will probably laminate two sheets of 1/8" Russian Birch or 1/8" MDF. Those materials just finish better if you are going with paint. Quote Link to comment Share on other sites More sharing options...
jorjen Posted May 19, 2007 Share Posted May 19, 2007 Another.... Quote Link to comment Share on other sites More sharing options...
jorjen Posted May 19, 2007 Share Posted May 19, 2007 The tops I am working on..... Quote Link to comment Share on other sites More sharing options...
soundbound Posted May 19, 2007 Share Posted May 19, 2007 Great ideas and work! That's why I like this forum. Good people with good minds who put them to use and do some sweet projects. Quote Link to comment Share on other sites More sharing options...
Edgar Posted May 19, 2007 Share Posted May 19, 2007 ... next time I will probably laminate two sheets of 1/8" Russian Birch or 1/8" MDF. Those materials just finish better if you are going with paint.Has anybody ever tried this?: http://www.outwatercatalogs.com/2006_Master/lg_display.cfm?page_number=322 Quote Link to comment Share on other sites More sharing options...
jorjen Posted May 19, 2007 Share Posted May 19, 2007 Sorry, left this out. One of two projects I am trying this horn with. Plan on using the JBL 2482 driver in both projects. The other is a 3-way Jubilee clone. Quote Link to comment Share on other sites More sharing options...
DizRotus Posted May 19, 2007 Share Posted May 19, 2007 This makes it easier to see what Edgar is suggesting. http://www.outwatercatalogs.com/2006_Master/lg_display.cfm?page_number=322 Quote Link to comment Share on other sites More sharing options...
jorjen Posted May 19, 2007 Share Posted May 19, 2007 Edgar, Thanks for the website. I have seen this material before, but have not used it. Looks like nice stuff, eh? Couple more good sites for bendable material: www.neatconcepts.com and www.formwood.com (this site has veneered bendable MDF in many choices) Quote Link to comment Share on other sites More sharing options...
meagain Posted May 19, 2007 Share Posted May 19, 2007 I wonder how thick the material needs to be. I mean, could one make one out of luan (which would/could bend), then some coating to solid it up and nix vibration? Quote Link to comment Share on other sites More sharing options...
jorjen Posted May 19, 2007 Share Posted May 19, 2007 Lisa, I tried several different materials to see how far they would bend to determine what types of materials might be used. I did not have any luck with Luan. The radius is tighter than it looks. Luan and Masonite cracked/broke under this kind of pressure. Russian/Finnish/Baltic Birch can be used at 1/8" or thinner to conform/bend to this radius. Tried soaking and steaming, did not work. Did'nt really expect it to with this kind of ply. Anyway, my point is, a curve this tight obviously greatly reduces the types of materials available for the application. The bendable materials(like the 3/8" that I used)with exceptions of course, seem somewhat delicate to me. That is why I will most likely laminate two layers of 1/8" Birch Ply next time I make horns of this type construction. The strength, rigidity and non-ringing properties of this approach just seem to make sense. Quote Link to comment Share on other sites More sharing options...
Edgar Posted May 19, 2007 Share Posted May 19, 2007 This makes it easier to see what Edgar is suggesting. Thanks. How do you insert an URL so that it acts like an URL and not like text? Greg Quote Link to comment Share on other sites More sharing options...
meagain Posted May 19, 2007 Share Posted May 19, 2007 I'm surprised it wouldn't work if wet. Hmmm..... Well, what about veneer? IDK what thicknesses veneer comes in but if these horns don't have to be super thick (or one can dampen/support the non-visible parts with something over it)..... then one can get a pretty wooden horn look as a bonus? Quote Link to comment Share on other sites More sharing options...
Edgar Posted May 19, 2007 Share Posted May 19, 2007 Thanks for the website. I have seen this material before, but have not used it. Looks like nice stuff, eh? Definitely looks interesting. Note that Outwater recommends laminating two sheets with the cuts on the inside. That would be a whole lot more stable than a single sheet. Greg Quote Link to comment Share on other sites More sharing options...
consistent Posted May 19, 2007 Author Share Posted May 19, 2007 Beautiful work Jordan. I caught your full thread and you have a gift. By the way I have now done some A/B testing 401 v tractrix in my system, while there are certainly some irritations with the AK4 crossover using the tractrix, the result is cleaner and more defined than the 401. The sweet spot is also bigger and better. Cheers Steve Quote Link to comment Share on other sites More sharing options...
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