[Otto]

Hi Greg,

Is your sub crossed over at a frequency lower than 100 Hz? That would lend to decreased sub output at 100Hz. Your curve seems to take a dive at about 80 Hz, but I doubt that's all due to the crossover (if it's at 80 Hz). That appears too steep to be a crossover.

What's it look like without the mains engaged?

It looks like, from the graph you have here, that your mains are going to carry on their signal at about 80 dB (roughly). You should be able to crank up your sub enough to get about 80 dB at the valleys, and then apply attenuation using the BFD. That's what I did, and I think it worked out great.

Good luck with your BFD this weekend; I know I spent too much time with mine last weekend.

-- Otto