Sorry - meant bamboo, not balsa. Saw that about an hour after I posted it. Ascend Acoustics use bamboo for their speaker cabinets. Must be age creeping up on me and on my birthday no less.
I realize that MDF has been the de-facto building material for speaker cabinets for decades.
I just thought that other Klipsch Heritage speaker cabinets were made from plywood. I was mistaken. That was true for the original versions, not true for today's versions.
I also thought that at $3200 (premium Tigerwood finish), something other than MDF would be used. My bad.
Geez - I really wrote balsa. Images of rubber band airplanes from my childhood come to mind.
Rich