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

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 

ho ho ho..ebm doesn’t think his speakers ring.  This is very important!   😉

If they do it sounds great to me and many Audiophiles who have heard them.Thanks again I'm sure your speakers are great as well.Thanks again.

@bache,

https://www.bbc.co.uk/rd/publications/rdreport_1977_03

Here is what I would say about that.  How many CONCERT level instruments are made out of plywood or MDF?

Answer = 0

While a speaker is not an instrument in the sense that you can play it, it shares ALL of the concepts of a device, usually some type of chamber in which sound is projected for the audience to hear and enjoy.  

It would seem to me that Wood would be the obvious choice.