Klipsch K-1023-K 10" speaker info needed.

I have 2 of these each in my Klipsch KG 5.5 speakers. I emailed Klipsch and they say they really have no specs on these to share. They're K-1023-K 10" (25.4cm) Injected Carbon Graphite cones, and I'd like to get an idea of their performance potential - if they're not so good then I can plan on changing speakers before wasting much time working with them. I'm trying to decide on possibly trying to upgrade these speakers versus going a different direction. Anybody play with these that can give me any input?