I just picked up a 2011 Soul Base and got a deal on a Bluetooth radio from ebay. Everything seems to work just fine but when I tried to hook up a used OEM microphone to it I can't get it to hear me. I jacked into Connector C1 pins 1 and 2 that I could find online, which looks right as they run into a shielded style wire instantly just like the microphone. I've tried wires each direction, which should really matter but no luck. I tried wiring the mic into a cut off 3.5mm jack into the computer, it hears me even though the volume seems really low. Here's diagram I'm going off of which seemed correct for jacking into the wires for my sub amp.