|Subject:||HA earphones construction|
|Posted by:||JC (menard…@orange.fr)|
|Date:||Sun, 25 Dec 2011|
I would like to know how the HA earphones are built, are they magnetic,
piezo....they are so tiny that I do no understand how they can transmit low
frequencies such as 250 Hz.
I did not found valuable answers with Google, has somebody some info ?