[diabeetusman]

I'm not an audio engineer or a musician but I got custom IEMs and they were a great decision for me. My ears don't work with the majority of in-ear style audio devices out there for some reason-- my left ear is fine but everything falls out of my right.

Back when I flew a lot, I could have my IEMs in but not listening to anything and I could barely hear the engines. There was a crying baby behind me and I didn't know until I took them out (while listening to music almost as quietly as my phone would go).

It goes without saying, but they're also incredibly comfortable too.