The U47 has a special kind of quality that on the right singer/source it doesn’t get better, only different. Our lovely U47 is back from the doctor, and it sounds amazing! After 60 years the transformer just gave out, poof.
We did some very scientific testing (our ears) and A-B’d it to the Wunder Audio CM7 here and you know what, they both sound great. David Brown in LA is the man who works on all my vintage mics. It got a new power supply, connector, cap cleaning and other goodies.