These are dynamic drivers? I've got a few custom ear tips made for Etymotics, but they're for the ones that have balanced armature, and a few years ago, the ear tips weren't interchangeable between the balanced armature (small tip going towards ear) and dynamic driver (larger tip going towards ear). Anyone know if that incompatibility has changed?
If you get these, or any Etys, spring for custom ear tips (unless your ear canals are really, really close to perfectly round.) All in-ear monitors work best with rock solid seals, and if you have very oval-ish, or almost rectangular ear canals like I do, my choice was always great sound with pain kicking in about an hour into listening because I had to use such a large tip, or so-so sound with no pain because I didn't put them deeply.
With custom tips, that I could swap onto new Etys when I upgraded, I could listen for hours and hours (like a non-stop NYC to Hong Kong flight) without any discomfort. Ety used to subsidize custom molds (in the good old days) but even without, it's a couple hundred dollars for tips that you can use forever.
Unless your dog gets hold of it. Yeah, lost one to my dog thinking it was doggy chewing gum. Didn't swallow it but chewed it for almost an hour before I noticed. Ugly. But thoughtfully removed it from the Etys before chewing.