I've posted this on two other sites, so if you've already read it, I apologize... I've EQ'd my sub with the BFD to the point I'm currently at; I've needed about 5 filters to get to the point I'm at. But I have a few questions, I'm hoping somebody out there might have the answers: It doesn't seem that cutting the hz at frequencies over 80hz has a measurable impact at all. I've got a filter at 97 hz to cut the output by about 10 hz; the result is no different than before I put the filter in. So the crossover in my receiver is set at 80hz, and I know it doesn't just cut off there, but rolls off from that point on up. So the question is, at the frequencies above 80hz, is there any way to use the BFD to smooth things out, considering only my subwoofer is connected to it? In other words, after 80hz, the main speakers begin to put out a progressively larger proportion of the sound relative to the subwoofer, so it seems that there is no real way for me to fix this. One more question. Would it be helpful to do the measurements with the main speakers shut off (sub only) as well as the sub shut off (mains only)? I'm thinking they all need to be on as that's how I'll listen to movies. Also, would there be any benefit to raising the xover to 100hz, to allow me access to flatten things out above the 80hz level? Any help with these questions would really be appreciated; I'm kind of at a stopping point for the moment. Thanks very much.