If interested in (admittedly rough) speaker comparisons, I posted the following YouTube video today. Mainly, I wanted to try out the CUI 13x18mm CDS-18138A micro speaker as a replacement/ improvement for the Knowles Grand (being discontinued). As well, I wanted to include (the fairly large) Tang Bend T1-1925S module (a 1" speaker with a passive radiator in enclosure). For details, see the Notes accompanying the YouTube video at that site.
If interested, there are related threads on the LokSound Yahoo User group forum, especially interesting are postings with technical testing info by Larry Hanlon in related threads of July 2016 and July 2017.
Paul
Modeling HO with a transition era UP bent
I appreciate the diligence of your demonstration, but the bottom line is there is no such thing as "bass" in a 1" speaker, regardless of enclosures or diaphragms. The "better" samples aren't so much better as they suck less. When the live music world went to in-ear monitors, it sucked unless you had a $600 set of in ears. Even then it wasn't great. Great requires custom fitted ear pieces in the many thousands range. Give me some old school triple driver side fills and some hearing damage any day. BLI is on the right track for getting good low end. Hopefully the industry can adopt some sort of standard with off-board low end.