Currently, I have a 500w Memphis amp and a 12" Kicker comp sub in my 80 Delta. I installed it from the beginning with the big 3 upgrade running on a stock Olds 350 engine...but I love my bass and want more. I wanna put another 12 in with maybe a 1200 watt amp, but am worried about having dim headlights when the bass hits. I dont currently have that problem, but I was also thinking of switching out my headlights to something led and brighter. ...case in point, i was thinking about upgrading my alternator, but my question is would I need to change my battery also? I rather not add a battery to the trunk, because I'm looking to use that space for two battery racks for the lowrider transformation. Any helps always appreciated, peace..