While they do go nicely down to @40hz , I really don't think that they could compare to the Heritage series from Klipsh in the base department .
Actually much of the Klipsch Heritage series do not go that low...I think this is a common misconception based on the fact that the classic Klipschorns do handily make it down to the 30's when used in the corners...not if you take them out of the corners though. Belles and LaScalas drop off sharply around 50hz. Heresy's definitely don't make it below 50hz and you'd be lucky to get them into the mid 50's. Cornwall's would do the trick down into the 30's. The Fortes and Chorus go pretty low, but are not part of the Heritage series.
Marco