I have a monster stereo in my boat and run two batteries just in case. Four 4.5" Rockford Fosgates and 4x Infinity 6.75" two-ways on one amp and a 12" Infinity sub w/ integrated amp. Haven't killed a battery yet but I try to run off #2 (deep cycle) when we are anchored up with the tunes. The alternator keeps up pretty well while running. Did 110 miles round trip last Friday (Gorge run!) with the tunes CRANKED and battery was at 12.4V when we shut down for the day.
The stereo is kind of like horsepower and handguns - I would rather have it and not need it. Since you already have the components I would hook that sucker up and monitor your electrical draw. Any idea why the PO disconnected everything?
"Speed's fine, but accuracy is final."
- Bill Jordan
1998 Donzi 21LXR
1971 Boston Whaler 13