Hi plocke, that was a nice reply from Wayne, the 1600Hz xover. But thinking about your case I didn't see information on their web site (TAD) about a frequency response curve on their drivers/speakers. In this case is a must have (simulation), unless you know the "material" output from your head. Anyway they are all very similar (construction techniques between brands having the same materials or similar types of characteristics) but I don't have that kind of experience... right Wayne? Thanks ploke. Best Regards.