With a good series X over the different drivers blend in and you get a more single driver experience (in a good way).
IMO, if you got the impression that a series is better with your lower price range speakers there is no reason to believe that your top speaker wouldn't benefit as well. Generally might be a series easier to implement in a 2-way than in a 3(+)-way speaker but if technically feasible I would try it.
With a good series X over the different drivers blend in and you get a more single driver experience (in a good way).
IMO, if you got the impression that a series is better with your lower price range speakers there is no reason to believe that your top speaker wouldn't benefit as well. Generally might be a series easier to implement in a 2-way than in a 3(+)-way speaker but if technically feasible I would try it.
I can honestly say, this was the best video I've seen in a long time.... The sheer talent this little 4 year old has is amazing. I can only imagine how she will develop and hone her skills over the years!