Looks like another one to try. That’s the feedback from an aliexpress buyer on Punch Audio Martilo IEM 1 Planar + 2 BA + 2 DD.
“First review, a honest and transparent one. No exaggeration, no overhype. This is a very, very well tuned iem. The sub bass is deep with a satisfying amount of presence. The mid bass shows good separation and transitions smoothly into the sub bass, following notes accurately. The bass is exactly what you’d expect tight, punchy, thumping, bouncy, clean, with no bloat. The mids are the most impressive aspect. Male vocals have a natural, full bodied sound while female vocals are well extended and free from the huskiness you often find in bass boosted iems. The vocal execution is the best i’ve heard so far in a basshead iem with female vocals displaying spot on timbre! This balance in the mids is in my opinion the most standout feature of this iem. The treble is smooth and well extended. Soundstage, resolution and extension are also very good. Overall while this may be marketed as a basshead iems it’s far more than that. To be honest they didn’t just get it right, they nailed it. 10 out of 10”