Here are the results of my subs freq sweeps. I used test tones of 20,25,31.5,40,50,63,80,100,125. Heres the numbers without the RS comp added. These are post EQing. 20hz---75db 25hz---78db 31.5---79db 40hz---84db 50hz---81db 63hz---82db 80hz---78db 100----72db(better now) 125----81db I figure with the RS compensation I have a great house curve. My main concern is the large dip at 100hz, is this likely to be audible? Would moving the front speakers help with this dip? I assume it is the front speakers interacting with the sub resulting in the cancellation at 100hz. Earle Check out my webpage for equipment list and pics of speaker placement.