I’ve had an Oak D whistle for quite some time, and love it, but I’ve never gotten around to getting a C till now.
The Oak C is an attractive whistle, looking like a slightly larger version of the D. I was surprised to find that the Oak D is much heavier than the Oak C, which leads me to think the Oak C must have thinner walls or perhaps a different alloy of metal under the chrome finish.
The Oak C takes a bit more air than the D, and also responds well to moderately aggresive play.
The tuning is decent but does tend to go a bit sharp towards the top of the octave. Still, this isn’t so drastic that you’d notice unless you are checking it with a tuner, and it’s easily correctable on the fly.
Like most inexpensive whistles these days, the whistle is tuned sharp out of the box. Getting it in tune was merely a matter of loosening the fipple with hot water and then moving it back until it was in tune.
The sound of the whistle is good, not quite as good as the D in my opinion, but still very good.
Here’s what both Oaks sound like on Planxty Davis:
http://www.flutesite.com/samples/oaks_planxty_davis.mp3
First in the recording is the Oak D, then followed by the Oak C.
–James