12 ohms. That's pretty low impedance. If the impedance didn't vary with frequency like most IEMs, it should be fine.
If not, it won't sound good with most smartphones since their output impedance is high when compared with 12 ohms
MoesI was meaning to say Dynamic Driver actually, apologies for the unclear message
Around this budget, I doubt any dual driver (BA setup) would be a worthwhile listen. But then again, I don't exactly know what these Chi-Fi manufacturers can do with so little