i have the knob at around 40% i would say i listen at moderate to low volumes, i use monitor mode and just found out knobs behind only work for music modeHi, do you hear that peak at lower volumes or is it only on the loud stuff (or transient bursts, like the loud explosions you mention)?
The MR4 is a nice, flat, speaker but it can't do loud. It's possible that what you are hearing is distortion - and some people are more sensitive to that.