Yea i have 13.9 volts at the front but at the amp, i only had 10.9 volts so i have a major voltage lost. Im thinking maybe one of my batteries are bad. Ill get it checked out today. I love my sundown amp. Its awesome and i cant wait to get the most out of it. Since my radio only puts out 2 volts to the amp, should i get a line driver to up radio volts to 5-6?