DIY speakers of solid/reclaimed wood?

Reclaimed lumber is actually a verygood  choice just liken making guitars .old lumber all the moisture and resins are dry and acoustically much tighter. Once your uusesevetal natural costs of a tongue oil , or something natural ,Not polyurethane allows the wood to breath . I prefer tongue oil in ships have been using for hundreds of years let each cost dry the finish not only is more durable ,but as a added benifit it breaths and is water resistant .
if you can get it in a natural finish you have a winner. My friend is a custom cabinet maker so I learned a lot obout the best applications.

I would think the biggest problem would be cost. Thick dense old growth walnut is very stable. Stable enough to be the preferred wood for gun stocks. But nice, dense tight walnut is insanely expensive.

Tongue oil? Do you give your speakers a good licking? 😛 Do you get splinters?

Is it just me but doesn’t MDF generally sound dead and lifeless? Or is that being too redundant?

These look very nice, small and worth trying.

In general though, no, you don't want to go getting 3/4 knotty pine for your speakers.

Previous works I've seen used a 2 layer system, with the internal 3/4" or thicker MDF, and an outer shell of raw wood. They can be gorgeous.

Too lively a cabinet creates a speaker that only works in some circumstances.