I received the Dixon Low A I’d ordered from the Whistle Shop last night, and to my dismay had to send it back. I have a Dixon High D and love it, but this A whistle was flat on some notes in the lower octave (F#), sharp in most of the higher octave, and sometimes balked at producing any notes. This whistle is supposedly tunable, but I didn’t have luck at that either–I’d remedy the sharpness and make the flat notes worse or vice versa. It was frustrating since while I’m nowhere near a great player, I’m not a total novice either, having played whistle for a few years and flute before that. I guess what I’m saying is perhaps it’s me and not the whistle, but I have many other whistles that play fine. I’m going to try a Shaw Low A since I like the whole Clarke breathy sound.
I also have to agree with some others in recent threads about Susatos, whether you love 'em or hate 'em, and yes they’re hard to control sometimes in the upper octaves, at least mine are in tune. I have the D/C/Bb set, as well as a Kildare A, which is pretty nice. Also have some low ones but haven’t developed fingering skill for these yet. If Susatos in general had a bit more chiff, they’d be perfect, but I do come back to them.
As for D whistles, I’ll just have to wait for the Burke that I have on order.
The search continues . . .