Wunder Audio CM50 User Manual
Wunder Audio Microphones
 
1. CM50
The Wunder Audio CM50 Tube Microphone comes with the original 
spherical capsule. "Simply one of the most wonderful sounding 
room mics in the world." The CM50 represents the pinnacle in a 
revered line of microphones that stretches back to the very earliest 
days of the Pro Audio. The inspiration is classic, the execution is 
cutting-edge. We have successfully recreated the small pressure 
transducer (similar to the capsule for the KM series microphones) 
embedded in the surface of a 40 mm diameter perspex sphere.
It should be stressed that vacuum tubes, with their heater filaments, 
are much more delicate than solid-state components. Consequently, 
the user should take great care in handling the microphone. A drop 
from even a moderate height may cause the filament to break and 
may result in immediate failure of the microphone. It would be 
advisable for the user to keep a spare tube – specially selected by 
the Wunder Audio Service Department – always ready for 
replacement.
It is important to note that the tube may have become slightly 
unplugged from the tube socket during shipping. If the microphone 
has no audio output, 99% of the time it is a result of a slightly 
unplugged tube. 
Repairs are to be carried out only by experienced, authorized 
service personnel. Unauthorized opening of, or modification to 
the equipment shall void the warranty.
The microphone tube requires a high operational voltage. 
Contact with the voltages present in the interior of the 
microphone and PSU may result in injury or death; therefore, 
the microphone and PSU must be opened only by an 
authorized, qualified technician.
The microphone must be operated only with the supplied 
cable. Because hazardous voltages are generated by the PSU 
that may result in injury or death, always ensure that the 
microphone cable is undamaged. Damaged cables must no