I don't think you realize/understand how much voltage your alt will take to power your amp. A full blown 2k watts will yield dam near or just over 140 volts.....compared to your weak 110 stock one and majority of that alt is going to your amp. Everything else, in your car, wipers, heater, etc is just a small portion. Do yourself an electrical a favor and upgrade the alt. bIg 3 is an absolute must also. Worst you'll see is lights dimming. Then next week we'll see a new post on that from you on how to get rid of it.I am not trying to exceed my alternator... It's not like you have zero headroom with a 110A alternator.