Beyerdynamic M500/M260 Ribbon Replacement Service
The Beyerdynamic M500/M260 is a great sounding hyper cardioid ribbon microphone. They employ a small geometry ribbon, with an acoustic chamber behind the ribbon that extends into the base of the microphone to alter the microphones pickup pattern.
In many cases, there is debris in the magnetic gap, which can take the form of flaking glue, or sometimes metal contamination. In this example, flaking glue is preventing the ribbon from proper movement. Unfortunately, in most cases the ribbon needs to be replaced in order to properly clean.
Here are a couple of examples: