As I understand the cone excursion should not exceed the Xmax of a driver. According to the LspCAD 100W will drive sealed 3ft^3 parallel shiva near Xmax. Does it mean that I can use my receiver (H/K 520, 75wpc) with it and have all the power I need? Shiva specs says I can apply 375W to it - which exceed the Xmax on the 8mm . How bad is that?