Does anyone have an Oldsmobile alero or similar GM car with a wimpy 110 amp alt. I am just curious if that size alt will support a 500 watt sub amp and about 100 - 150 per side amp for comps? I don't really want to upgrade my electrical system. I am trying to get something loud but sensible. I may go with a strong 4 channel amp but I can't find just the one I want. Any ideas?