My guitars are all Mahonany and spruce combinations. Any of the other typical woods like Maple and Rosewood I have found to be quirky. I always found the Rosewood to be a very brittle sound, except on a fine Lo Prinzi guitar that I played once and will say is the best sounding guitar I ever heard to this point. Maple always seems like it holds the sound and doesn't fully release it unless its an archtop with a spruce top.

Mahogany has a warmth and an expansive sound that I just admire greatly. The sound from my Guild and Martin seems to fill the room rather than explode into it. They also seem more resonant with a fuller sustain than the Rosewood D-35 Martin a friend has.

I have played a Black Walnut 00 sized guitar with a Spruce top that shares many of the Mahogany guitars characteristics. But it lacks the age they have for seasoning of the wood and sound. I will be greatly interested to hear this 00 Walnut/Spruce in 20 years.

I have small experience with Koas except for one Weisenborn Hawaiian I heard. I seemed to be the middle between Mahogany and Rosewood.

Don