And finally here are the results at 0.28Vrms.
If used as intended this is a very low distortion driver. The bass distortion will only improve with a passive radiator reducing the load placed on the main driver.
A pair would fill a small room with music and sound fairly good while doing so. Used near-field along with a tablet, or phone, for viewing Netflix they should sound pretty great.
To test these I 3D printed a small baffle that the speaker then mounted to. The measurements were taken at about 8cm away from the driver, with a densely stuffed chamber sealed behind it. The chamber was large in volume relative to the drivers parameters. 8cm may not sound like a lot but with such a small diaphragm you're pretty much far-field.