I have a tweeter and a midwoofer. Is it possible to find a good cross-over point with only the t/s parameters for each of the 2 drivers? Do I need the frequency response graphs? Is there a good program available that can do this? I have made graphs with a program called loudspeaker LAB 2, but the graphs seem to be a very rough estimate and my woofer has a flat freq. response up to 10 Khz, which I don't think is actuate.