I just hooked up my D3 in my 1998 pathfinder and it works perfect. The only problem is that when I listen to the music loud for a while and turn off the car, the battery is dead. If I just listen to the music at regular noise levels it doesn't do this. The battery is fairly new so that shouldn't be the problem. I used to have a 1000watt JL amp in the trunk and this never happened. is this my alternator? the battery even though it's new? any ideas at all?