I have been in touch with Bruce and he told me his ukuleles were made in about 65% humidity, i.e. not in a controlled Environment. That is not acceptable to me as where I live the humidity stays around 30% long time during Winter, about 6 months, each year. Not only that, even in ebay I reckoned I could find some small cracks developing in the B.W. concertos that were just recently made in Taiwan. But I know very many are most pleased indeed with his instruments.
I also found som solid koa top Concert ukuleles from both England and Germany, but in neither of the cases could they give me a sound test or confirm that the instruments were built in humidity controlled environments.
I have been listening to very many koa ukuleles on Youtube. I find the sustain and the slightly "crisp" tone of the koa interesting, though I am more used to mahogny and tend to find its tone warmer and sweeter.
But as someone said, the question whether you like or dislike the tone of an instrument is much a matter of how used you are to hear it. Play it and you either start to like or dislike it.
I´ve been looking and listening to some Kala ukulele and guess that such a big producer of instruments certainly make quality instruments that more likely are of an even quality too.
I also found this
Tanglewood Java has anybody tried it?
Costs about $250 US.
It looks pretty simple but I like the idea of ”Open Pore Satin” even though it certainly makes it more sensitive in other aspects too.
This
Kala Asac C too, interesting.
How would you describe the differences in tone between a spruce and koa top?
I am sorry to say that most unfortunately there are no Music stores in my city that sells any solid top koa ukuleles.
Regards