Which type of ECM is this ?

Thread Starter


Joined Jun 23, 2015
Hi all,

Recently i bought some ECM (microphones) to experiment with them ... I didn't knew (at that time) there are two types (2 pole : + side is also output) and (3 pole : + side and output are seperated). I included a picture of the ECM i bought in attachment.

Can someone tell me if its a 2 pole or a 3 pole and whats the + and - side ?

Info :
- 1 of the pins is raised (left pin)

Thx Mike