Anyone considering taking the Senfer PT15 v2 apart to use the drivers elsewhere, don't. The way the drivers are glued in (and the earbud assembled), you will completely destroy the drivers getting it opened up :0( On a related note, if anyone wants me to post photos of the graphene diaphragm, lemme know and I will take some. Also, the PT15 magnet is extremely powerful. I have no way to measure it, but it is noticeably stronger than the average magnet of an identicaly-sized driver. This, in combination with the graphene diaphragm, is most likely why the low end on the PT15 v2 is as good as it is.