I am looking to use a speaker motor or a high wattage speaker minus the cone to absorb some of the power coming of a tube amp. The setup would be a 4x12 cab rated around 300-400 watts, 120watt tube head, and the speaker motor. I am hoping that the speaker would absorb some of the power and allow me to drive the tube head harder but without blasting the windows out of a building. Power tube saturation is a great sound and not alway easy to get ... even though the cab is capable of handling most of the heads power ... it gets deafening quick. Let me know what you think and feel free to comment if I can explain in further detail.