I am wondering about something I hear alot of people talking about and want to know what it is. What is the big three? I have a Sundown audio 1500.1, to a single 12, sub box tuned to 40 hz. Electrical setup is as follows, for right now at least, stock battery up front. With two runs of 4 guage back to kinetik 800, then to a 3 farad cap, then to fuse block and lastly amp. Ground wire on second battery, and capacitor are 0 guage. I know I need to upgrade to all 0 guage, that is coming. I ran outta money, but I am still running at 12.7 at full tilt. And that is at the amp. I am just looking for more db's anywhere I can get them. Any help is and will be greatly appreciated.