I have a Kwood excelon 2 channel runnig two excelon dvc 10s. They are pretty dang insane i love them but lately at night ive noticed them fading to the beat even though i have a 1 farad cap. Could my battery be going bad? Most of my trips are short and the bass is always pounding so i suspect that my batt isnt getting the charge it needs. My car has about 45k on it im the second owner so im not sure if its the same battery as the original. What kind of battery is the original. Mabye i should just replace it. Input would be helpfull.