Join Date: Sep 2008
Location: Schererville, IN
Upgrading the alternator is your best option. Dual batteries help with a voltage drop, but they won't solve it. Your alternator has to be able to output the current demand of your amps and all the other components in your car simultaneously before you'll eliminate a voltage drop. If you're running the sub at 1 ohm, the amp is going to pull close to it's rated current draw. Assuming the amp is accurately rated (and that the model is PX1.2000D), it's capable of 2000 RMS @ 1 ohm. If you're using the gain like a volume knob and not for matching the input voltage, you are probably clipping the amp. Running that kind of power alone at 1 ohm generally requires rebuilding your entire charging system. Clipping adds more stress to that. I'd check into a new alternator and set your gains with a DMM. I'd also read about the amp and see if it does rated power or if it's overrated. I know Soundstream used to be pretty accurate when it came to ratings, but things change.
-94 Caprice Classic LS - system, Gary's wires, 200 amp alt, tint, first base/home plate delete, clear corners w/green parking lights, LTZ hood emblem, SS springs
-97 Grand Cherokee TSi - 4" IRO lift, OEM skids/hooks/hitch, sliders, 31s, rear locker, system, tint, cloth, clear corners, Magnaflow stuff
Refs: DesertDawg, 214Texas, QUICKSSILVER, SSon22s, MadMav, gary burton