Hi there, I'm Roman Lihachev
The main idea of creating such a case is quite simple and clear: the earbuds do not fit snugly to the ear, due to which the amount of bass, especially on the street, may not be enough - I corrected this situation with new sound tubes.
The development and testing of this case was carried out for about one year, and there are more than 50 versions! Each time I improved the appearance, bringing it to the ideal. Not only acoustics affect the listening experience - the careful fit of the dome of the case, its dimensions, allow you to comfortably and securely fix the earphone in your ear.
The development of the connector fixing also took a lot of time and all for the experience and convenience of the audiophile: one connector - plenty of choice. The reliability of 2pin is undeniable, and the choice of cables on the market is huge, which served to use it in my project. As for MMCX, a case is also being developed for it and will be released later.
I connected all three tubes into one, getting a rather long channel, similar to a snail in acoustic speakers. New single tube version in development and testing. The main goal is to make the presentation smooth, but at the same time to make the bass deeper and more noticeable. The difference between the second version and the first is a slight reduction in bass and an improvement in mids and highs - closer, bigger and brighter.
Download a Initial version .STL
Download a version v2 with mmcx .STL
Good: berillium, composite, graphene, etc. BAD: LCP