Earbuds AKA flatheads (above in photo A) are actually closer to open-backed headphones than IEMs (photo B), in that earbuds lie outside the ear canal. Thus, they have no isolation (and usually lack in sub-bass), but they have a more expansive soundstage than most IEMs. Unlike headphones, earbuds don't have issues with clamp force or heat of earpads.
Sub $20 USD is considered "budget" for earbuds, midFI is about $20 - 100, and TOTL earbuds can be gotten above $100 USD. So the flatheads are generally cheaper than IEMs in the respective price brackets.
Even a $1 USD
Vido is quite decent in sound (yes it is $1 USD!!). You can perhaps try a Vido?
- At the budget segment, the
RY4S Plus 32 ohm is fun sounding V shaped, the
NiceHCK EB2S is quite balanced, and the
Yincrow X6 is like a BLON BL-03 of the earbud world.
- At midFI, the
SMABAT M2S Pro is a earbud with interchangeable drivers (which changes the sound), and the
Faaeal Rosemary is a 150 ohm bassy and dark monster.
- At TOTL, my go-tos are the
Yinman 2.0 600 ohm (600 ohm impedance and a damn wicked sensitivity of 87dB/mW), which is dark and smooth (though the specs mandate that a nuclear power plant drive these Yinmans), the
Yincrow RW2000 (balanced and technical), the
SMABAT ST10S Black Gold (basshead V shaped), the
Ourart QJ21 Selected Edition (midcentric beautiful vocals), and the
NiceHCK EBX21 (neutral bright technical behemoth).
So as not to derail this thread, perhaps you can ask more in the dedicated Headfi earbuds thread:
https://www.head-fi.org/threads/earbuds-round-up.441400/, the folks there are very friendly and helpful! There's lots of folks here that make DIY earbuds on Headfi too, which are quite killer in performance:
@FranQL ,
@RikudouGoku,
@ValSuki and
@tgx78 .
I still use
@FranQL 's special DIY creation high impedance LCP earbuds every week!