Islander Posted April 2, 2009 Share Posted April 2, 2009 Birch plywood is what Klipsch has always used, as far as I know, except for custom orders or when the design calls for MDF. With some models, lab testing showed MDF to sound better than plywood. Link to comment Share on other sites More sharing options...
CIGARBUM Posted April 2, 2009 Share Posted April 2, 2009 Not sure I agree, the Cornscalas I built, I used 13 ply Baltic Birch, but the sound will tell, good luck Pal CB Link to comment Share on other sites More sharing options...
kev313 Posted April 2, 2009 Share Posted April 2, 2009 You really show that you don't know much about plywood. Cause what you see in the pictures that i am using is 3/4 inch paint grade maple. Which is 41.00 per sheet. So if you ever can afford like a half a million dollar house and want your kitchen cabinets painted and not stained. If you have them custom made and not by prefabs that are cheap built any cabinet maker will use 3/4 paint grade maple. 11 ply baltic birch... are you kidding me? what are you looking at? Will have some fiberglass on joints. What was that again...maple or pine? Link to comment Share on other sites More sharing options...
ssctrojan1980 Posted April 2, 2009 Author Share Posted April 2, 2009 Finish grade maple paints much better than birch. MDF is heavier but as you know when you screw into MDF sometimes the screws can strip where as in plywood you can screw and glue your joints much tighter. I think it comes down to preference on sound with plywood or MDF. I have heard both and i think it hard to tell. Personal preference. Link to comment Share on other sites More sharing options...
ssctrojan1980 Posted April 2, 2009 Author Share Posted April 2, 2009 It is paint grade maple plywood. Link to comment Share on other sites More sharing options...
Deang Posted April 2, 2009 Share Posted April 2, 2009 You initially said, "It is 5 ply white pine...Pine is much stronger to screw into while your joints dry." You then said, "nothing is glued on these", and finally, after Roy Delgado (the designer of the Jubilee box) said he saw a mistake, you responded with " what is the mistake so i can fix it?" So, is it Pine or Maple, are they glued or not, and do you really expect Klipsch to help you fix your mistakes so you can sell these for profit as a competing product? Link to comment Share on other sites More sharing options...
ssctrojan1980 Posted April 2, 2009 Author Share Posted April 2, 2009 the mistake was a deflector board. but it wasn't mistate because i had not put it in yet. your timeline is way off with mine... Link to comment Share on other sites More sharing options...
ssctrojan1980 Posted April 2, 2009 Author Share Posted April 2, 2009 OK... a quick lesson on hardwoods and softwoods. All plywood whether its oak, pine, maple... all are equally as strong. Lumbercore, is as little stronger than the plywood. As far as the woods themselves pine is the weakest! Maple and birch are stronger than pine. Oak is stronger than all of these and Walnut is stronger than oak. When you get into using 3/4 in plywoods. Whether is paint grade maple or stain grade oak they are all equally strong. Go to your local cabinet maker and ask. Link to comment Share on other sites More sharing options...
michael hurd Posted April 2, 2009 Share Posted April 2, 2009 You forgot about 13 ply baltic birch plywood, all birch throughout. Pound for pound, stronger, heavier than any other ply. It's also a lot more money, but is also without voids. It's usually sold in a metric size, 5 feet x 5 feet. Link to comment Share on other sites More sharing options...
Deang Posted April 2, 2009 Share Posted April 2, 2009 the mistake was a deflector board. but it wasn't mistate because i had not put it in yet. your timeline is way off with mine... Not sure what you mean by my "timeline". If it's in reference to the way I laid out the order of your comments, then you might want go back and simply read your posts in this thread. 13-ply baltic birch is what Klisch uses. Link to comment Share on other sites More sharing options...
JL Sargent Posted April 2, 2009 Share Posted April 2, 2009 We use a 19ply 28mm thick plywood at work. It just a wee bit stronger than these mentioned.[] Certainly overkill for speaker fab. Link to comment Share on other sites More sharing options...
Moderators dtel Posted April 5, 2009 Moderators Share Posted April 5, 2009 How does this look for strength ? Oak Link to comment Share on other sites More sharing options...
Marvel Posted April 5, 2009 Share Posted April 5, 2009 Are all those oak? A lot of plywood uses birch or poplar for the inner plies. Bruce Link to comment Share on other sites More sharing options...
ssctrojan1980 Posted April 5, 2009 Author Share Posted April 5, 2009 are all what oak? Link to comment Share on other sites More sharing options...
Marvel Posted April 5, 2009 Share Posted April 5, 2009 How does this look for strength ? Oak Are all the plies oak? A question for dtel. Not all veneered plywood is the same all the way through. The interior plys are often made of other woods.Baltic Birch is all baltic birch, for instance. Link to comment Share on other sites More sharing options...
Moderators dtel Posted April 5, 2009 Moderators Share Posted April 5, 2009 I really doubt it Marvel, maby the dark layers ? Link to comment Share on other sites More sharing options...
colterphoto1 Posted April 5, 2009 Share Posted April 5, 2009 I'd bet it's all birch except for the outer veneer layers. Link to comment Share on other sites More sharing options...
bhendrix Posted April 5, 2009 Share Posted April 5, 2009 Yellow poplar is commonly used for veneer core plywood. See plywood manufacturing video here: http://video.bobvila.com/m/21319559/making-birch-veneer-plywood.htm Link to comment Share on other sites More sharing options...
Blvdre Posted April 6, 2009 Share Posted April 6, 2009 The dark plies could be the end-grain, depending on how they do the lay-up (alternating sheets w/ grains perpendicular)? Just a guess. Link to comment Share on other sites More sharing options...
dkalsi Posted April 6, 2009 Share Posted April 6, 2009 Someone here quoted Baltic Birch ply at $48 sheet. The cheapest I could find it locally was $62 for a 5'x5' sheet (here in the metro DC/VA/MD area). That price is for 13 layer 3/4" sheet. Anyone knows were I could find this cheaper in the DC area? Link to comment Share on other sites More sharing options...
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