Welp, there’s a number of published measurements showing this to be optimistic. As I noted elsehwere, I’ve found a couple of different models shown to be around 2 Ohms for most of the bass. This includes the SE and 20/20. Perhaps I’m misinterpreting the statement or the charts?
@erik_squires You have got the measurements for the wrong speaker. You keep bringing up the Focus series. He has the Signature SE. The Signature and Focus are not the same speaker. I don't believe I have ever seen impedance measurements of the Signatures.