Meridian learned a lot from the 8k development programme, but the 7ks were developed mostly in parallel and so didn't benefit from the majority of the learnings. The 5k2s on the other hand did as they were developed later. The 7k2s also benefitted fully, and also brought apodizing, SpeakerLink and, most importantly, time-aligned bass to the equation.

Roon Developer and ex-moderator of this Forum
I am #25 in the HH1 photo of fame.