So my mate's Shure GLXD16 wireless receiver's power supply conked out at a show recently after the heat shrink part after the block frayed and gave out. He's looking for a replacement one but most seem to be 9-12v, and I think this one runs off a 15v adaptor? He tried a 9v one in rehearsal over the weekend and he had buzzing sounds throughout his signal. Switched heads to start as we thought it was the amp, and then to a cable before it stopped.
I'm guessing these wireless receiver's use a lot of power and it'd need more than a standard 9v adaptor?