How to tell if your headphones have Fazors

Any LCD-2s with serial number starting with 54 or higher should have Fazors. Any starting with 53 (and a few starting with 56 from the early days) will be a pre-Fazor model unless the drivers were serviced after the beginning of Fazor production, which began in January 2014.

Any LCD-3s with serial number starting with 27 or higher should have Fazors. Any starting with 26 will be a pre-Fazor model unless the drivers were serviced after the beginning of Fazor production, which began in January 2014.

To the best of our knowledge, all LCD-Xs and LCD-XCs should have Fazors installed, since those headphones were launched at the beginning of Fazor production in January 2014.

The best way to check for sure is to feel for the Fazors inside the earcup: if you feel a flat metal stator plate with openings in it under the mesh, your headphones have no Fazors; if you feel the tips of triangles, those are the Fazors themselves.