Hi Simon, No, running the P3 on a DC power supply would not do it any harm at all, but it would not have worked very well!
It’s possible that some signal would get through but it would be distorted, and the phantom power would certainly not have worked.
Yes, we have power supplies for all territories for the P3 and any other of those devices (P4 and earlier preamps) that run on 12VAC power. Drop me an email ([email protected]) to tell me if it’s UK or US or EU type.
