Finnish birch 2.

Curvi loudspeaker Design of Finnish  birch plywood

 

Here are the Curvi Model 1 and Etude Reference loudspeakers at the CML Audio base in Manchester, UK. Both of these speakers use Finnish Birch plywood in their construction. The Curvi uses a laminated approach to give resonance quelling variable wall thickness and a streamlined reflection reducing transmission line. The Etude Reference (not commercially available) is founded on a birch ply framework covered with 4 mm birch ply skins, this hollow, cavity walled structure is then filled with a high density polyurethane foam. The baffles are machined from laminated birch plywood.

 

www.curvi-hifi.com

 

Birch plywood was specified by the BBC as the only wood that can be used in making the cabinets of the long-lived LS3/5A loudspeaker.

 

http://en.wikipedia.org/wiki/Birch