I just purchased a pair of Bose QC35 headphones and have the following observation. I tried using them to practice playing drums with them and they are fine except for one annoying issue. When I play a bit hard, I am hearing a pop that corresponds to my stick hitting the head. It sounds like the headphones are being overloaded with sound even though I am playing them at about a quarter volume. It almost sounds like "clipping" at high volume. Any ideas what might be causing this? Would there be a very high quality headphone that is non-ANC that would not possibly have this issue? I am wondering if the ANC is causing this problem.