Thanks for the response, however, I might be even more confused now. If the 3000Hz is correct, I will have more (cheaper) options in terms of passive networks. That does seem a bit high to me though. I am pretty sure that mine do have the x-curve. I have to push the levels 3-5db's up in comparison to my other Klipsch speakers (that are of the same era and have the same sensitivity) to get them to blend well. Even then, the highs and lows just don't seem like they are there.
Oddly, I also got an email from Klipsch support this morning stating that it was 65Hz, which definitely can't be right. I assume the rep thought I was asking where to cross my sub over, but even then, the low end for the KPT-100 is 75Hz.
Surely with the number of these things that seemed to have been dumped on to the market in the last year or so, someone has tackled this project. I will have to take Speakerfritz's advice and create a new post. I tried to put this in the correct place (Pro), but maybe somebody in the consumer area has done this.