Holy P!$$ !!! I am gonna need an alternator. My stock one makes 130 amps, but that ain't going to cut it. Voltage is getting down to 12ish, and I am only running the amp at half tilt. I have not even set the gain yet, I just turned it up until I had sound which was at about say 3 on a scale of 1-10. But, these SA 12's rumble man. I am very impressed with these subs and the amp so far. The amp is stiff. I still have some tuning to do, but so far so good. I appreciate all the suggestions, recommendations, nut hugging and hand holding from you guys. I think I will be very happy with this.