Not good with the grill on your daughters head..i have no grill but want to, because of dust,,,if you want to test how the grill behave on the music..try some music with a good deal of tweeter sound..maybe you can hear difference ,,maybe not..if the grill are wery tranparent , it can be hard to hear difference..i think you can measure the difference,,because of some reflection from the grill
best Bjarne