Keep one other issue in mind: Your daughter's hearing is way better than the average middle aged male. What seems detailed in the high end to you will probably sound harsh to her? I would be careful on the electronics for that reason also.
Finally, kids love bass. They don't notice if it rolls off at 35hz. They just want to make it thump sometimes. Find her some fun looking gear?
Finally, kids love bass. They don't notice if it rolls off at 35hz. They just want to make it thump sometimes. Find her some fun looking gear?