I was watching Master and Commander at around +5 reference and it sounds great, but I notice that the BFD clip light comes on. I use the +4 setting on the back. I also notice that the right input meter begins to light up and clip as well when the left side (input I use) is clipped. Why does the right input meter light up? What exactly does this do to make the sound less good sounding? It does not clip my sub amps or bottom the subs. Thanks.