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Good Day! I received my set of VooDoo circuit boards and tested them briefly. They work with both electret and true condenser capsules and sound ... um ... OK, I guess. I am not equipped to do formal measurements and have only had time to perform brief recordings on an inexpensive USB mixer and also a low cost USB audio interface. It appears one must use the two boards together, as using just the FET board with an electret capsule is a bust. The modular connector at one end makes it easy to connect the XLR pins, and the capsule + and- are soldered to flat "painted" pads at the top of the FET board. Using the through-hole pads on either side of the C3 capacitor is a bust. One of the photos posted by Henry S has read arrows pointing to th e+ and - symbols - the actual solder pads are situated left and right of those arrows, closer to the edge, respectively. The oval and circle pads on the long side edges appear to be common ground. They do not really fit the popular BM-700 / 800 series bodies, as they are 70mm long, and that is exactly the same length as the distance from the top to bottom ends of the internal mounting frame.

Bottom line - it appears to be a very low cost pair of circuit boards which operate both electret and true condenser capsules, and which sound OK. In my very short tests, they do not sound as full or as bright (i.e., treble roll off) as, say, a set of OPA Alice boards, or commercial microphones such as a Berhinger B-1 or CAD Equitec E50.

I attach a couple of sound files for reference - i.e., you be the judge. I might make additional clips with a guitar. So far, just voice to determine if they work.

Just MY take ... your mileage may vary considerably! James -K8JHR