I always wonder at reports of SS electronic or even wire (!) "break in". Speakers are mechanical so there may be something going on there but it'd be interesting to find out if Dali has measurements of speaker low freq output improving after hours or if it's all based on "golden ears" subjective experience.
Personally I suspect much audible break-in is due to a psychoacoustic/psychological phenomena well-established for decades termed "accommodation". IOW the listener is accommodating to the unique sound of the speaker, increasingly able to "listen through" irregularities of FR-dips/peaks in the bass, harshness in the HF, etc etc. In that case it's the ear/brain of the listener that's likely what's being broken in. We all experience this when there is fairly regular background noise-after awhile the brain tends to tune it out and you are no longer aware of it unless your attention is redirected back to it.
I tend to think the same way about Dali manuals recommending biamping/biwiring/triwiring and their fancy cables- I just don't know what science that's based on.