As far as I know, you can set different X-over frequencies for each of the front, centre, surround and surround back speakers with the following models:
Denon - Later models only, e.g. 2808 and above.
HK - Even the older models such as the 235.
Sony ES - Even the older models such as the DAXES, X=1,2,3,4,5,7.
Onkyo - Not sure about the older models but the new ones for sure.