Reply to Sound quality problem with new earphones

I recently bought a pair of Shure SE215s to try out earbuds vs. full headphones but the sound quality is seriously lacking. The midrange in particular sounds very compressed and harsh, similar to how a bad Youtube video or 96kbps MP3 sounds.

I've tried all the included tips and had no significant improvement, and I've also ordered another set of silicone tips to try. My super cheap Sony DREX12IPB sound much better so I'm assuming something must be wrong with the Shures..