I am attempting to install this amp with 2 front speakers, 2 rears and my aftermarket headunit(pioneer). I know where some of them should go, but others are confusing me. What is 'switched positive'? Does it run inline with my ignition? And what about the 'Battery B+' terminal? And what are your thoughts on the speaker outputs...I know there is a CENTER and BASS speaker output, but I don't have that. Should I tie those into another speaker output, or just cap them off?