Right, i got my first amp today an Eltax Atomic 8.2. Now heres the questions. 1.What does putting the LFE to " -15, -35" ect do? does it reduce the bass or increase it or sommit else? 2. on the back of my sub theres a phase switch which has two settings "0" and "180" what is it for? 3.Now i got a sub should i turn the base down form the speakers?