Wunder Audio CM7-FET S Condenser Microphone. It looks similar to Neumann fet 47, not exactly the same, on all accounts. One shortcoming of the U47 FET was that the design technology of the 1960’s FET transistor was in its infancy and the end result was not always desirable. Wunder Audio's CM7 FET, designed in part by Brad Avenson of Avenson Audio in Texas, is a large diaphragm cardioid condenser microphone patterned closely after the Neumann U 47 FET. It stores in a small wooden box, like the Wunder cm7. The Wunder Audio CM7-FET Suprema is a phantom powered version of the original U47. Wunder Audio CM7 FET S. The Wunder Audio CM7 FET Suprema is a phantom powered version of the original U47. Vintage King have some photos of this mic. One shortcoming of the U47 FET was that the design technology of the 1960s FET transistor was in its infancy and the end result was not always desirable. The original goal with a phantom powered mic was to bypass the need for a tube PSU. The Fet mic has since obtained a legendary status The circuit was quite desirable, using transistors creating a very robust sound. The Wunder Audio CM7 FET Suprema is a phantom powered version of the original U47. The Wunder Audio CM7 FET Suprema is a phantom powered version of the original U47. The Wunder Audio CM7 FET Suprema is a phantom powered version of the original U47. One shortcoming of the U47 FET was that the design technology of the 1960’s FET transistor was in its infancy and the end result was not always desirable. The original goal with a phantom powered mic was to bypass the need for a tube PSU. the shockmount that came with my Wunder cm7 FET looks just like the shockmount that came with the Valve version. The original goal with a phantom powered mic was to bypass the need for a tube PSU. The Wunder Audio CM7 Fet Microphone A phantom powered version of the original U47 was released in 1969 known as the U47 Fet. The original goal with a phantom powered mic was to bypass the need for a tube PSU. One shortcoming of the U47 FET was that the design technology of the 1960’s FET transistor was in its infancy and the end result was not always desirable. The original goal with a phantom powered mic was to bypass the need for a tube PSU.