Is the crinkling present when just wearing them? Please beware that they are sealed and pressing the cups against your ears is bad for the driver, as it is with most planars, especially soft diaphragms like the HE6s and Susvara.
I’ve owned 4 pairs of HE6SE and never experience crinkle when just wearing then normally. But one of them had the driver stuck to the magnets, what I recommend to do is take pictures of the driver when you receive the HE6SE. And tell customer service, HIFIMAN are one of the best at customer service and they will replace them if they are still under warranty.
I fixed my set that had driver stuck to the magnets by gently inhale air on the opposite side of the magnets.
I’ve owned 4 pairs of HE6SE and never experience crinkle when just wearing then normally. But one of them had the driver stuck to the magnets, what I recommend to do is take pictures of the driver when you receive the HE6SE. And tell customer service, HIFIMAN are one of the best at customer service and they will replace them if they are still under warranty.
I fixed my set that had driver stuck to the magnets by gently inhale air on the opposite side of the magnets.