So I power my pedals with a 1 spot power supply. Except one pedal (MXR EQ), which uses 18V. I do have the 18V adapter that came with the pedal but I'm lazy and the cord on the MXR adapter is pretty short so I sometimes power the MXR with the 1 spot. And don't notice or hear any difference at all using either power supply for the pedal.
So the question is, am I going to fuck up the pedal and/or the power supply if I use the wrong voltage adapter for the MXR? It would be nice to power all my pedals with just one power supply.
Thanks for your help
You probably won't do any damage by using less voltage. You probably just won't get the best performance out of the pedal... likely you won't get as much clean headroom, which could lead it to distort slightly. But that's just a guess.