I have a 100w Yamaha sub which has both speaker line inputs and direct line (RCA plug) inputs (as most do I suppose). My question is, is either one better to use ? The owners manual doesn't even mention the line inputs. If I use the direct line inputs, does it make difference which one (L or R) since my receiver only has one sub out ? Also, does it make a difference when using the power standby switch ? Thanks in advance to anyone that can help me out.