Agreed. Rather disappointed as I was expecting lusher, up-front, grado-like mids. These headphones do a great job with smoothing down high frequencies though. Sounds that were to harsh to me before were found to be balanced, but sounds that weren't just became blunt. Guitar has bite.
Mine has been burning in for around 40 hours now, the sub bass is less prodding, but still not unnoticeable. After more hours of burn in, they have opened up a little better, compared to the PL30's, have better mids and highs now. The soundstage is still more narrow, (not that I complain, I like intimate IEMS), so rock sounds good. Preferred tips are the single stock ones, Biflanges give it too much bass I think.
The mid bass is the culprit here, making everything muffled and veiled. I was even considering cutting off the plastic mesh to open up the sound, but I'll keep burning it and see.
For people who are past the 150 hour mark, is the sub bass decrease noticeable?