I bought this because I needed a power supply for the Yamaha MU1000, which needs 12V, 2A DC with a centre-positive connector. Yamaha no longer make a 12V supply that can provide that much current (their highest is 1.5A), but this supply seems to work. However, I don't have any expansion cards installed in the MU1000, so it probably isn't using the full 2A, and your mileage may vary.