You would connect the microphone to a microphone amplifier first. I think Frankie linked to an example. Then you connect the output from the microphone amplifier to an input on the NAD. Keep in mind, you can't play music and the microphone at the same time. It's one or the other.ok thanks again for the advice, i think i know these two cables. maybe I already have one I will try to use it. last thing: for the microphone, I have to attach it directly to the speaker Or first at NAD? Or as we said before I have to have a microphone amplifier. Thank you.