Hi Dan,
Great question about Bluetooth speaker creations.
I personally wouldn't just go the full range driver route.
My advice after building many speakers is to work out the end point first, then work back. What i mean is, if you Bluetooth speaker is to be used outside, then the bass is really going to be the issue, so full range driver route might not give you tge bass kick you'd expect from some tracks.
Full range drivers aren't generallythat good down low.