The passive LFRs are not compensated mid-band. This is evident in the curves and is a really big deal. It may actually be a bigger deal to the listening experience than equipotential listening window and sound power. In addition to passive vs. active LFR listening tests, it would be interesting to also do active LFR vs. active bi-polar.
BTW, Axiom might want to stop using the term "active" for this line. Active implies using electronic filters which are, for many reasons, not nearly as good as digital filters. Not calling this line "digital LFRs" may therefore be causing confusion for prospects.
