Hi, Isabel,
I used to play a Lyon & Healy 85 semi-grand in our local community orchestra, without any additional amplification. It projected very well, and I think your Daphne 47 SE would, too. Once when I was visiting the Atlanta Harp Center, I played a harp just like yours that sounded even better than a brand new L & H 23 that was standing right beside it. We were amazed that the smaller Daphne projected so well compared to the 23. Obviously, the 23 had not come into its full tone yet, which sometimes takes two years! Hope this helps.
Sincerely,
Balfour