| Depends on which "power block" you get. For instance, a dunlop brick is not very much more sophisticated than a one spot. Whereas a Voodoo Labs Pedal Power has isolated outputs which is significantly better as it greatly reduces the likelihood of ground loops forming.
Wall warts are very variable in their quality, which can be a headache. But, assuming good quality wall warts the major issue with them is the space they take up and their tendency to fall out of the socket.
One spots et al are ok, they're nice and compact and have plenty of power on tap, but they do leave open the possibility of noisy ground loops.
__________________ niftydog "My feet itch." Mike Patton |