Wood is a natural material.
Therefore, there are individual differences. The hardness, specific gravity, oil content, and other characteristics of the same piece of wood can vary slightly from one to another.
And the “wood” explained here is limited to when it is used as part of the rear housing of the earphones.
So it is interpreted a little differently from speakers, headphones or musical instruments.
Without a clear understanding of these “assumptions,” even useful information can become misinformation that leads to misunderstandings.
Please keep these things in mind.