ola,
i use a boss heavy metal for full on distortion, but lately ive found something rather strange. when using the pedal with just a battery it works normally, but when i plug the pedal into a 9V power supply, it goes nuts, sounds almost like a subdecay noise box, rather odd. so basically, my question is; why does the pedal do this and how can i use a powersupply and have it sound as it should?
I believe that the HM-2 uses a ACA adapter and not the standard PSA adapters that you usually get nowadays. But I can be wrong...
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Norwegian Bassists member #1 | The Fender Jazz Bass Club member #5 | The Electro-Harmonix Club member #105 | Gallien Krueger member #449
Mine is the same. It won't work with my power-all, but is fine on batteries. I've found a power supply laying around that it works with, but I'm not sure what's different about it.
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There's a uh, big machine in the sky, some kind of, I dunno, electric snake, coming straight at us!
hm2 + powersupply. 
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