Here is the motor from inside a Beyer M130 figure-8 microphone.
The mic has two ribbons, similar to the M160, and the metal spiral acts as a magnetic return path.
03-05-2016
Inside a Beyer M130
Here is the motor from inside a Beyer M130 figure-8 microphone.
The mic has two ribbons, similar to the M160, and the metal spiral acts as a magnetic return path.