I had the same experience with the Starfield: tip rolling helped bring some a bit more bass, but in the end it lacked note-weight and i sold it.That would be awesome. I would assume some of us are also interested in how the Olina compares to the Hana 2021, which per *some* graphs has 2-3db more bass energy than O2 (*some graphs) and Olina (*some graphs). And yet on Dan's channel O2 and Hana 2021 sounded IDENTICAL.
I returned the Starfield b/c I just couldn't get into the lack of bass (plus it sounded slightly tizzy up top). So if the Olina has the same or less bass than Starfield, then it's a no go for me. That is why the graphs confused me... some show O2 with less bass than Starfield, and some with slightly more. And HBB shows the bass of Olina and O2 to graph the same.
While I didn't get my Oxygen until after I sold my Starfield, based on memory, I believe the Oxygen has more sub-bass and bass. There is such good note-weight with the Oxygen that I never feel it's bass-deficient.