Personally I find that packing behind my ears with petroleum jelly alleviates minute vibration throughout the ear canal which in turn, dutifully increases my sensitivity to sub 30hz bass...🤯
OK...here's another tweak that really works
I recently recabled my reference 2 channel system. The upgrade in sound broke new ground in what I thought was possible with existing components. I had not, however, heard of the Matthew Bond Audio Cascade Noise Burn-In Disc - V. 2.0 until it was referenced in one of the fairly recent Forum Posts. More out of curiosity and the fact that I have had some very positive results with other assorted/sundry tweaks, I decided to give it a try. I have played the disc only a couple of times and am amazed at hearing a very real improvement in all aspects of the system and especially the glare that I really didn't know existed.
Anyway, I would enjoy hearing from any of you that has had some exposure to this or other tweaks of this kind.