I couldn’t find any info on the driver size of the ER2 series so I contacted Etymotic and got an official number from them.
The official response I got from them is that the driver size of the ER2 series is 5.8mm.
Tag: single-dd
JVC HA-FD7 – Unboxing
Unboxing the JVC HA-FD7 (1DD). Feel free to leave a comment if you have any questions.