Interesting comment. I just had the same result with a recently acquired 20" vintage kick that's been giving me fits. I was about ready to give up after 2 weeks of tweaking...and almost always trying to go lower on the tension. I just decided to try a full turn higher on both sides. The drum woke up. So I went a bit further. More booming....a bit of echo...and easily heard over the other drums. I was happy as now it sounds like a 1960's kick. Maybe your post planted that seed in my head?Then I tried the opposite and went higher than it had been. One full turn up on the batter side, and a half turn up on the reso... My brother was over, and standing out in front of the kit to help me tune. When I kicked it for the first time after the adjustment both of our jaws just dropped! This thing suddenly sounded HUGE!!! I swear it sounded like someone suddenly put a really nice mic on it with a massive PA behind it! We were both in awe! I don't even know how to describe how much of a difference it made.