Well, yes, i will use another preamp then, but i cant sleep already. I tried to get 700 mA by using resistor, but this dont work. Probably, tommorow i will open box and try to find what electricity ways are thinking about.
Sorry for my english ><
Hello!
I have exactly same problem with my ART Tube MP (i bought 9v 1A power supply and got same symptoms, then i started to search in google). Can you tell me, did you found solution for this problem?