No, you won't. Biwiring could only make a difference if the original single wiring was ridiculously thin for the job. Assuming any decent speaker wire (say 12 AWG or better) then biwiring is pointless. The reason is physics again - google 'superposition theorem' and it will explain why I am right and you aren't on this occasion.
I don't understand the purpose of the question, sorry...
If you mean if someone is using 18 AWG and they then biwire, will that have a benefit? Yes it might. I did say that if the original wiring is totally inadequate then using twin wires coud make a difference. But you don;t need to biwire for that - just replace the inadequate wire with 12 AWG.
Did you google superposition theorem?
The electromotive force argument is spurious. The argument is that biwiring eliminates the backwave EMF. But the reality is that the cables are wired in parallel to one amplifier, so they just electrically combine at the amp. Denon can't change the laws of Physics, not in their R&D department and definitely not in their Marketing department! ;)
Well done, dude! This is the first step to understanding the things that make a difference to SQ (room and speakers), the things that make very little, if any, difference (amps and electronics) and the things that make no difference whatsoever (magic cables, biwiring etc).
No - you will be fine. More power is better for your speakers than too little power. In a balanced and calibrated system, all the channels will be level-matched anyway.
