I have a a MA2500C and I've mixed up the power adapters. I have two 500mA 12V adapters, but one is pin positive, while the other is pin-negative. Both fit - which is the correct polarity? Normally this info is printed on the device, but I cannot find it on the MA2500C or in the manual.
Help is appreciated. Thanks!
The inner is positive, outter is negative.