BS Button Posted May 25, 2005 Share Posted May 25, 2005 This is what I understand served as the basis for the Heritage line for years. What or how many ply's? and where do you get it? Thickness was 3/4", correct? BS Quote Link to comment Share on other sites More sharing options...
boom3 Posted May 25, 2005 Share Posted May 25, 2005 ---------------- On 5/25/2005 5:02:50 PM BS Button wrote: This is what I understand served as the basis for the Heritage line for years. What or how many ply's? and where do you get it? Thickness was 3/4", correct? BS ---------------- http://www.woodcraft.com/ has sheets up to 24 x 30 inches http://www.woodnshop.com/hardwood/Baltic_Birch_Plywood.htm has sheets 5 x 5 ft Baltic birch is metric so 5 x 5 ft sheets are the largest I've seen. The second link has 3/4 inch 13 ply which is about as good as it gets...I can't exactly speak to what Klipsch used (thickness and plies), but it was high-quality plywood. Paul told me in 1978 that he used Russian plywood, although he didn't like their politics. Quote Link to comment Share on other sites More sharing options...
Marvel Posted May 25, 2005 Share Posted May 25, 2005 These guys carry lots of great woods, at great prices. I am fortunate to have a store within about twenty minutes of my house. Pretty good explanations of grain, and cuts too. But you need to be in the East for this. http://www.hardwoodgroup.com/ Quote Link to comment Share on other sites More sharing options...
djk Posted May 25, 2005 Share Posted May 25, 2005 Early Klipschorns were made of 1/2" fir, then for a while the Klipschorn and LaScala were made from 12mm Baltic Birch. The LaScala then went to 3/4" Birch plywood. Later the Klischorn went to Luan. The other Heritage models were made of 3/4" Lumbercore (Poplar) with a veneer face. The unfinished Cornwall and Heresy were made of the same 3/4" Birch as the LaScala. The CII and HII went to MDF. Quote Link to comment Share on other sites More sharing options...
jheis Posted May 25, 2005 Share Posted May 25, 2005 My Birch La Scalas and Heresys are both 7 ply 3/4" James Quote Link to comment Share on other sites More sharing options...
BS Button Posted May 25, 2005 Author Share Posted May 25, 2005 7 Ply. There it is. I thought that Lowes or preferrably Home Depot carries this stuff? Baltic Birch.. Quote Link to comment Share on other sites More sharing options...
formica Posted May 25, 2005 Share Posted May 25, 2005 All my decorator Heritage are of 7 ply "Birch plywood" as djk said... which isn't the same thing as Baltic Birch. ---------------- On 5/25/2005 7:17:55 PM boom3 wrote: Baltic birch is metric so 5 x 5 ft sheets are the largest I've seen. The second link has 3/4 inch 13 ply which is about as good as it gets... ---------------- Ditto. The sheets of Baltic Birch i've seen, and have, are 1500mm x 1500mm (5'x5'), 13plys, and 20mm thick (25/32"). It also weights about twice as much as regular ply. It's nice stuff... my subwoofer is made of it. Rob Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted May 26, 2005 Share Posted May 26, 2005 Yes, all mine are 7 ply as well. It must have been available in 4x8 sheets at one time. Isn't the reason the LaScala box is 24"x 24" to make perfect use out of a sheet of plywood? Michael Quote Link to comment Share on other sites More sharing options...
Marvel Posted May 26, 2005 Share Posted May 26, 2005 ---------------- On 5/26/2005 8:18:41 AM colterphoto1 wrote: Yes, all mine are 7 ply as well. It must have been available in 4x8 sheets at one time. Isn't the reason the LaScala box is 24"x 24" to make perfect use out of a sheet of plywood? Michael ---------------- The last Birch I got was 11 ply. Unfortunately, a 48" width won't get you two 24" panels after you run a saw through it. Maybe close enough. You could try ApplePly , which uses 1/16" layers of Birch and Alder. Up to 1 1/4" thick. Marvel ApplePly.pdf Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted May 26, 2005 Share Posted May 26, 2005 I don't think there's much diff, isn't the Baltic sea adjacent/in what was then USSR (Russia). Same thing? Any woodworkers know anything about Birch trees grown in that area of the globe? Marvel? Michael Quote Link to comment Share on other sites More sharing options...
BS Button Posted May 26, 2005 Author Share Posted May 26, 2005 All hardwood in every ply and void free are the two keys, I think... Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted May 26, 2005 Share Posted May 26, 2005 AH, so it's not just the outer layers, like in veneered plywood- it's ALL birch? Isn't the Baltic birch fairly lightweight for a medium 'hardwood'? I remember my boss at Caliope Sound building some 6' all in one cabs with Community fibreglass horns. They were super light for such monstrosities. He said it was the type of wood (baltic birch). Quote Link to comment Share on other sites More sharing options...
Marvel Posted May 27, 2005 Share Posted May 27, 2005 Michael, 3/4" fir ply will be lighter than 3/4" Baltic Birch ply. The Baltic Birch will be much stiffer as well. Quote Link to comment Share on other sites More sharing options...
BS Button Posted May 27, 2005 Author Share Posted May 27, 2005 Michael, The other choice might be "Balsa Birch"? Quote Link to comment Share on other sites More sharing options...
formica Posted May 27, 2005 Share Posted May 27, 2005 Like I mentioned earlier, Baltic Birch is about double the weight compared to the standard SPF plywood. The hardwood layers are heavier as well as the additional glue due to the thinner layers. Quote Link to comment Share on other sites More sharing options...
colterphoto1 Posted May 27, 2005 Share Posted May 27, 2005 So THAT's why my back hurts from muscling around all those cabinets in the garage the other day. In my younger days, could carry a LS up a flight of stairs. Now it's a herculean effort just to double-stack the durn things! Michael Quote Link to comment Share on other sites More sharing options...
djk Posted May 27, 2005 Share Posted May 27, 2005 "The other choice might be "Balsa Birch"?" Klipsch Pro made some speakers out of end grain balsa, similar to racing boat construction. Sub was dual 18, mid-bass horn loaded 15, various HF options. Click on 'images' (you need a TIFF viewer) http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1=5,000,286.WKU.&OS=PN/5,000,286&RS=PN/5,000,286 Quote Link to comment Share on other sites More sharing options...
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