Creating music and music reproduction are very different endeavors with very different criteria for the materials used to accomplish them. Instruments can have a distinct and desirable sonic signature. Hi-fi music reproduction should have as little sound signature as possible.
The material used for hifi speakers is less important than how it’s used (within reason). MDF is a pretty decent affordable material if adequately shaped and braced. It can be cut, curved, drilled, veneered, and painted, Concrete and other stone can sound awesome but is pretty impractical to ship, and difficult to work with. Birch ply and other hardwoods can be fine too, but are more prone to resonance and warpage than MDF, and the environmentalists are likely to give you more grief for using it if you choose exotics. MDF on the outerwalls with pressboard bracing works out pretty nicely IME.
Old pine is great for guitar and organ music production, but not so much for hi-fi music reproduction
The material used for hifi speakers is less important than how it’s used (within reason). MDF is a pretty decent affordable material if adequately shaped and braced. It can be cut, curved, drilled, veneered, and painted, Concrete and other stone can sound awesome but is pretty impractical to ship, and difficult to work with. Birch ply and other hardwoods can be fine too, but are more prone to resonance and warpage than MDF, and the environmentalists are likely to give you more grief for using it if you choose exotics. MDF on the outerwalls with pressboard bracing works out pretty nicely IME.
Old pine is great for guitar and organ music production, but not so much for hi-fi music reproduction