The power supply is completely different. If you use a power supply that was used before the PSR2000, you will fry your keyboard! The older ones had a transformer, the new one's don't! They use a switching system & they're lite as a feather in comparsion! Gary's right they are 16volts not 12V.
Nobby

[This message has been edited by Nobby (edited 06-13-2005).]