https://www.aliexpress.com/item/4000911586243.html?spm=a2g0s.8937460.0.0.816c2e0eYDTRozTry a sweatband to increase the clamp. Holds the headphone on quite well and having the pads tight removes any hint of the hollowness. I actually had a little channel imbalance because the right cup was looser on my head than the left. The sweatband/headband fixed everything I had issue with. Also my listening level on my amp dropped from 1 o'clock to 11 0'clock once the pads were tight.
These ear pads would fix M1070 hollow sound, better fit, It's also cheap. I will take some pictures when I'm home, look pretty nice