Yeah, the voltage must match (in FC 12, can take anything from 9-12v), but the amps can be any number equal to or above what is required. The unit will only draw the amps it wants/needs at any given time, so having more is not an issue. Having less amps than necessary will be an issue though!! Don't forget to ensure that the +/- on those power supplies matches the polarity on the FC12 (Positive on ring, negative on center). If you power supplies polarity is opposite do NOT plug it in to the FC12. I think you can reverse the wires on the power supply unit though if it is backwards!