@audiotroy
We have the ATC SCM 11 and the SCM 19 in the same room as the Ref 1 and the Paradigm Persona B they all sound dramatically different.well in which case the question is why do they sound dramatically different? All those speakers are two ways. They are all high end. They all use non resonant rigid boxes with bracing. why should there be such huge differences? one possible answer is that the crossover is wrong. Ive said this before. They cant all be right. At least one or more of those speakers are designed incorrectly.