Good Koa is nothing short of spectacular.
It is golden honey-colored, with rich brown striations and lustrous figure.
Koa's density varies tremendously and this is generally reflected in its color, the darker examples being stiffer.
I find that instruments built with Koa back & sides balance a percussive and punctual upstart with a warm tonal body.
The softer examples are punchy and sweet with good projection, more like Mahogany.
Harder Koa is more dynamic, offering better projection and remarkable definition.
I recommend Koa for slide playing, country blues and good old ragtime pickin'.
I have Koa available in two grades.