I didn't know the sex, but after observing them for a while it appears I have a m/f pair. I had a hen already and was looking for her a "friend" for quite some time. Unfortunately at the moment she doesn't want a thing to do with these two. They have tried to buddy up with her and she has just become a snob. HOpefully she will warm up to them.
I have already heard the male sing and the hens have the most annoying "squeak". In the pictures you will notice that one has a much lighter breast. That is my original one.
They have taken tons of baths in the aviary. It is too funny. It is as though they have never had a bath before. They won't stay out of the water. They are adjusting quite nicely. HOpefully some babies soon.....
Best wishes for healthy babies in the near future 
I know what you mean about the unpleasant voices. I have had many mannikins in the past but what they lack in song they make up in beauty.
