Measurements taken using v0.1 of my DIY IEM measurement rig
Unboxing the JVC HA-FD7 (1DD). Feel free to leave a comment if you have any questions.
The Azla SednaEarfit XELASTEC are some of the grippiest wide-bore tips I’ve come across and as far as I know the only ones made of TPE (thermal plastic elastomer), which means they softens with body heat and change shape to fit your ears (unlike urethane foam tips that changes the shape of the ear canal).
I find, I need to choose a size smaller (MS) for these than the JVC Spiral Dots (M). I think this is because the Sprial Dots are spherical (hence wider) while the Azla’s are cylindrical.