sounds like it could start to get a little heavy on the power.

I dont think tha t you'll drain the battery unless you run the music for over a day (someone else can do the exact calculations!)
Considering that a battery has at least 180 cold cranking amps, mine has 280 or so and i can run it for a good few hours at above moderate levels before it runs dry. (not great i know but it happened). my system runs 10 amps at low levels and could do so for quite a few hours.
Even if the system runs at 2 amps, it could run all day I'm sure.



Murray 06000047
I don't think, therefore I am not.