as much as I would like to mod the crossover it's pretty much unaccessable. In the back of the speaker there is just banna plugs and no access to the crossover. In the front there there appears to be no way of accessing the crossover.
If somebody put this crossover inside, it means that there should be a way to take it out. Most likely you will need to take off the woofer.
At the moment it has been sounded real good and I have had it up pretty loud. I am pretty satisfied at the moment sonicly but as always my quest for knowledge has going am I F**KING SOMETHING UP?
Hard to say. If you are lucky, it might be fine. If not, some kick drum umpth can make your ribbon fly over your head at the best, or fry your amp at the worst.
Also, it is hard to say what the specs for the woofer are. If you raise crossover frequency, lets say to 3.5K, using 3rd order, then there is a chance that the woofer does not go that high. Without knowing all these things it is hard to suggest something specific.
Here is what I'd do, if I wanted to do it right. First, I'd change the woofer, as well, for something more serious. There are a lot choices here--Morel, Audax, Wifa, Scan-Speak, Peerless, Cabasse, etc., which could go as high as 8-10K. Then I'd do a first order, crossing at somewhere around 5K. If you want ultimate, then biamping would be a very good option, using electronic crossover. Many of them have continusly variable crossover points, so you could fine tune it for the best sound.
In any case, if you decide to keep it as it is, at least put a nice polypropilene cap instead of stock, most likely chipo electrolytic.