What exactly do I need to use the Behringer ECM8000 Measurement Mic with my soundcard (with 3.5mm mic and line-in inputs)? I know it needs phantom power, but do I also need a mic preamp? I'd like to keep this portable, so a battery powered solution would be preferred. I see lots of different boxes on ebay (phantom power, mic preamp, direct input), from really cheap to really expensive, but I'm not sure what exactly I need. Any recommendations would be appreciated.