Summary: A concise review for the Denon AH-C260. It has about 50 hours on them.
Gear used : iPod classic 7G / iBasso CB04 / New iPod Line Out / iBasso T4
Bass: Slightly boomy with a decent punch, not so much sub-20hz rumble, though. Decent for a sub-$30 IEM.
Pros: Good mids, out-of-head soundstage with good recordings, impressive after EQ / warm amp