I am just getting into DJing and I'm having a problem with hooking the wireless mics up to a mixer. I have a Phoenyx PRO mixer 8 channel and a 2 channel wireles mics, same brand. I really only need one channel at my gigs. So my question is can I use only channel A on the receiver and only channel 1 on the mixer, and have the system work without hooking up the second channel?