Which material sounds better for speakers construction? Wood, Ply or MDF?

we made some speakers from   Bamboo 1 ply, 
the very solid material  ,and good acoustic performance 

ebm@  you right, The Magico , YG is not stupid, The harder material
get less  vibration , The harder wood, bamboo also better them MDF.
In reality  good braced  MDF is also good enough, The conclusion
if you  gonna spend more money--- best choice -aluminum , next
solid wood  and   last -MDF