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.