[Afiterco Tony]

So it's either 6 or 12 volt. I have seen some 9 volt systems but they are very rare. If you know how to use a multimeter or can find some on who does put it on continuity setting. Find a good clean bolt and put one lead on the bolt and the other on the center pin in the jack on where it plugs in. If you have continuity then you know you have center pin negative or ground. Also look close at the plastic where it plugs in. It may have information as to what voltage you need. Also, look for a diagram that looks like a 3/4 circle with a dot in the middle. If you find that there will be other markings like a line pointing to the circle or dot with a + or - sign. That will tell you also whether it is center pin negative or positive. So now you know the configuration of power and ground. Generally (used loosely) the center pin is ground or negative. You should be able to go to Best Buy. If you still don't know the voltage buy a 6 volt power supply along with a pack of different jack adapters that all will fit the power supply. Find the right jack, it should seat all the way in and be snug. Power it up. If the console does not come on take the power supply back and buy the 12 volt. Happy pedaling!!