no, I haven't heard them yet. I plan to hear them in a while when I can afford to get them, which will be in another couple months when the paychecks roll in.
I have always like the Kappas. One thing I have found though is there are a little flat with just HU power. Put a good solid 35 watts or so to them and they really come alive. They like being driven with an outboard amplifier.