OK, I just bought the Eclipse CD5425 and I also got a 4 channel amp that runs my front conponents and my sub. My old deck (JVC LH-3150) had front, rear, and SUB RCA out. but now i'm looking at my new Eclipse deck and I see the front, rear, and a "NON FADER OUT" RCA. whats the "non fader out" all about?? is this my sub preamp out?