I have the same drivers in a Martin King BR cabinet and have had several "locals" over to hear them on my custom (abraxus audio) 2A3 amp--but I will make the same comment Bob made in reference that I play jazz and female vocals and get pretty nice bass--to the point I don't feel the need for a sub---also, if the drivers are new break end on Lowthers is lengthy--- and you may try another angle Bob told me about---peel off the back cover and you will find post that change the driver to a DX2 ---pretty that is what Bob said---ask him to go into the diffs of the two models JD