[andy43]

I am looking for some IEM's that are not dependent of the fit to sound good. I bought some Meleec M6's for sleeping but found they way to fit dependent and I was constantly fiddling with them to make the sound good. I'm looking to spend around $40 and I like deep, impactful bass with neutral mids. 

 

[scompton]

I'm pretty sure they're all fit dependent.  If you don't get a good seal, you don't get good bass.  It's been true for the few dozen I've owned.

 

[calipilot227]

You won't find it at $40, but many have found that the Westone 4 is not fit dependent (or at least not as much as the Westone 3)

 

[ZARIM]

Sony XB40EX, JVC Xtreme Xplosive earphones, Denon C551, Ultimate Ears Metro-Fi 200 and Panasonic HJE400.