Hi sirquack,
I will expand on this when Ian returns to the Axiom plant (10 days) and I visit and get some listening-test time.
The comments were added to the article on the suggestion of Ian Colquhoun and Tom Cumberland, who designed the filters in the DSP circuits in the amplifier.
I know it contradicts the conventional wisdom that one should avoid "cascading" of crossovers, but I was assured that it's worth experimenting with and that, depending on the AV receiver or AV processor's bass management, it may produce a smoother transition. I'm not sure I hear any difference in my own installation so far.
Regards,