Sound would be fine with only one saber as a champion, problems (if they can even be called that) lie in other areas, lol. For example, champion sabers use momentary switches, warriors latching, so powering the warrior saber side off during spins and such is going to be a hassle, depending on the hilt style. Also not going to have matching lit AV switches, one side will be lit, the other not, and to charge the warrior side, you'll have to disassemble the staff to get the battery out, whereas you can just plug the other side in with the in-hilt recharge. Also, warrior sabers aren't as customizable with the LED, such as the blade flicker... if you wanted the blade flicker to be an option for both sides, going to have to go with champion on both sides. Warriors are just on or off. So there's a few things like that to think about... but soundwise? You'll be fine.