I was searching the internet for power supply until I saw the product that fit me most. I stumbled upon vocalist rp series , I wondered if I can use this for my daughter’s piano. I thought to myself that it might work. I’m not yet trying but i’ll try it sooner. But if you know the real use of visual rp series that’s good for you. But for me i’ll Google more next time. I think it’s for microphones but i’m not sure.