Quote Originally Posted by Rock&Roll Ninja
The wood, or quality wood product speaker cabinet, if not exposed to undu moisture or heat, can be expected to last in fine condition as long as any other wood furniture.... several centuries.

This make become important several decades from now, but in this, the 1st century of loudspeakers its a non-issue.
Does anyone know where the oldest speaker is and how old it is? That would be an interesting topic...I am not aware of any speakers that are older than 1 Century at this point.