I just picked up a used M13 and I love it! I also bought an SKB PS-55 pedalboard that also rocks! The SKB has two 1.3 amp 9 VAC outputs and I'm hoping to power my M13 from one of those jacks so that I don't need to also plug in the wall wart that comes with the M13.
I saw some archived comments about this issue, but nothing recently posted about it. Has anyone tried this? Any feedback on how it works? Is the draw of the M13 too much for the 1.3 amp output of the SKB PS-55?
One other thing I'm considering is putting a y-cable between the two isolated 1.3 amp 9 VAC outlets to make a 2.6 amp 9 VAC power supply. I'm pretty concerned about this, but I did talk to some of my friends that are electrical engineers and they seem to think that it should work without problem. Of course, it's not their equipment that might get fried if it doesn't work!
Any thoughts on the this 2nd possibility? I'd verify that the two power outlets are truly isolated (check continuity between the hot leads to make certain there is no bleed-over there. If someone has considered and tried this, please let me know.