Following the above posts, all I can contribute is a difficult mono voice recording: Schubert, "Winterreise" by Hans Hotter (CD, Gramophono 2000 AB 78725). Average (to say the least) recording, remastered in Cedar whatever. Hotter has a very expressive voice, not too chesty, clearly vibrating. Good for speaker distance. Chesky's "ears" a capella track is good for front-to-back gauging.
For the rest, no better than the above...
Cheers!
For the rest, no better than the above...
Cheers!