when i was a kid,(16-17) my car got smashed, so i took my system out, and on a tricle charger(9 amp)all the time to keep it charged. worked for a week, but like its been said, do not do this over time, use a yellow top or such, or better yet, just buy a plate amp ,and be done with it. my maw 15" is going into ht duty when i am tired of it and want to buy another sub. should be nice off around 400rms in my living room wall(hidden)