Nya, Steingraeber & Söhne, C-212

Top quality wood
The quality of the wood is of vital importance to a piano builder and one does not take any risks at Steingraeber & Söhne. It is stored at a carefully controlled and constant humidity of 40%. Steingraeber uses only "Bergfichte-, slowly grown spruce wood with the annual rings close together, of at least 25 years old, for soundboards. "The soundboard is not only an amplifier, but also the source of sound.
Therefore, the resonance of the wood must match the register of the piano, for which it is used. The solid red and white beech wood used for the combs is left to rest for another three years after entering the factory before being processed.

Principles of classical keyboard construction.