Just to step dangerously into the politically-charged Chinese microphone battlefield - Does anyone know anything about this microphone? Is it an imitation/copy of another brand and model? If not, is it being sold through a US company? There doesn't appear to be a Studio Projects equivalent (the frequency response of their tube mike looks very different from this one). I wouldn't mind having an inexpensive tube mike with smooth response, but I don't really want a copy of another company's microphone.