What I'm thinking is that direct or pure is meant to give you a clean output (pure even more than direct) for your system. Now if I have full size L/R Fronts, unless they are an electrostatic panel, they have a crossover between mid and bass. Just because a setup has that bass in a separate enclosure, that bass needs to be eliminated in pure or direct. That doesn't make sense to me, does it to you?
When I switch to pure, I believe I hear better highs and mids - but there is a definite loss in bass as my bookshelves don't do all the subwoofer does. So I can't really use pure..... am I being clear enough?