I'm running my pc sound card out to a mixer (behringer 602a) and want to connect my pc speakers (minijack) to the main out on the mixer.The main outs are 1/4" mono jacks and I need to convert that ...

What do I need to connect a Behringer ECM8000 "measurement" mic to a PC microphone input? i.e. power, levels, pre-amplification? Context: I'm not really an audio guy but we're building a new house ...