hello, this might be a very basic question and for sure results from my ignorance but I'll appreciate your help. I've been using wiim mini for a while with a pair of powered speakers. love it. I'm using it pretty much exclusively to listen to spotify. Now, I want to add a single speaker to the kitchen and I want to be able to group it with the existing pair. My first thought was to buy a new powered speaker with aux in + a new wiim mini. I assume this would work. However, I see there is a number of speakers out there with spotify connect built in. Would I be able to group such a speaker with the existing pair w/o a new wiim mini? Thanks!