If you plan on bridging the amp I would run 2 sets of rcas. If only using 2 channels 1 set would be fine

 

What is bridging?

 

Using a 4 channel amp as 2 channel to get max power for speakers

 

So I have been searching youtube to find a tutorial on an amp install and don't see anything on using the line leveler, can someone recommend a site where directions to install and amp with two speakers?

 

The pics posted above in this thread show how the line leveler goes when only using 2 speakers. There's also some additional explanation on it as well. I'm running an ultra so I went with a breakout harness and wired from that.