I'm having difficuly with my BFD and suspect it may by faulty. Attempting to tame my currently rather live room I finally got around to playing with my BFD. Temporary Room problems 12,500 cubic/ft 42ft x 20ft Partially Carpeted No Drapes (boarded up windows) BFD Graph here I'm pretty sure I understand how to set the BFD's filters, here's what I've done so far. With the sub level on the preamp turned up to just below clipping level in bypass mode and then re-calibrated to +3db using the sub's volume levels I get the Blue Line. Very messy results, but I knew that. The prominent frequencies that are prevailing are the reason it seems so quiet once they are tamed but I can re-calibrate again once I've "tuned" the room. I've turned OFF all filter presets in 1 to 3 and 5 to 10. I've set all active filters in Presets4 to "PA" and turned OFF those I'm not using. Lots of trial and error and I'm at the stage with the Pink line. I'm having difficulty making any impact at all on the frequencies above 45hz. I've tried setting a wide bandwidth filter covering the entire plateau, lots of little filters. I've even tried -40 gain setting individual "10" bandwidth filters at50, 56, 63, 71 & 80. Nothing has any affect what so ever on this frequency range. Anyone have any ideas what's up? or anything else I could try? Thanks, Mark.