For XO frequency, you don’t want it to be too high because high frequency has directivity so that outputting sound of that frequency via a single sub will affect the stereo imaging.
For phase alignment, there is an article on Genelec on this...
Yeah I think AF200 certainly fails your definition of class compliance. But I think there are at least two reasons why it should not be a big deal.
1. Right now, the support of super high sampling rates is enabled by default. The class compliance will be met if the support is disabled by...
I asked the manufacturer on Taobao and they told me the fix via DM.
I think they should really put such info on their and their distributors' shops. The fix is not available publicly in any language (Chinese or English).
I think it's better to think of this box as class compliant but also able to extend the class if needed. The "class" that Mac complies with probably does not support PCM1536 or DSD1024 anyway.