Every balanced armature design I've tried would give me fatigue after a little while of listening. This happened for years, no matter what iem I tried (warm, bright, bassy, etc). Figured it may of been just the way my ears were designed until I realized that the only iem I ever got along with long term was the Phonak PFE, which uses a single dynamic driver. Decided to give the Lyra 2 a try and loved it, then got the Vegas. I'm assuming I'm sensitive to balanced armatures, not very scientific but it's worked for me lately so I will be sticking to dynamics from now on. Yes, I wore the Solaris like that. It's just too big. Even the Andromeda was too big for me. Nobles and Shures are too big as well. Small iems like the CA dynamics (not sure about Atlas though, looks kind of big) & MD Plus fit perfectly.