BTW - My comments in the above response come from actual experience with the older & newer Raven designs, because I had the unique opportunity when I traded my Raven 2002's for the Raven C's to compare them TOGETHER at the same time in my room with my equipment before shipping the 02's back.
The C's came directly from the factory brand-new, with Bybee filters installed and all the latest updates. BUT - they had ZERO hours on them, so the comparison 'should' have heavily favored my 1-year old 02's. I expected it to be a close fight, but it only took 10 minutes of A/B'ing and shaking my head to come to the obvious conclusion --> There was NO comparison - the C's were devastatingly better in ALL areas, especially treble extension AND smoothness. The ceramic tweeter used in the C models is just superb.
Another big difference between early and late models is the design of the rear-firing port that is common to both Khorus & Raven. The older ones utilized a small, round aluminum insert. For the newer models, Talon designed a much larger slot cut-out with NO insert. The round port on my 02's would make noticeable rattling and chuffing noises when there were long, weighty bass notes. It drove me crazy, and definitely helped justify the cost to upgrade to the C's.
The new, larger slot-loaded port has more area to disperse the fast-moving escaping air, so it doesn't chuff. And since there is no metal insert used anymore, there is no way for it to rattle.
Just some more info to consider, but YMMV......
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