Hi all, I just spent all day tweaking my new BFD to flatten my in-room response. Initially I had both subs in the same corner (on the left in the picture below), but I found that the sweet spot was exactly one person wide. The freq response of the couch was +- 14db for the worst case tone. :b After moving the 2nd sub to the right corner and flopping it's phase 180 degrees I got nearly even response at every seat on the front couch. There ended up being about a (worst case) 4dB difference between the left and right seats. That's right! As calibrated, the entire couch is now +- 2dB. Plus raw c-weighted FR is +- 3db from 16 to about 100hz. Add the correction factor and I end up with a nice gental room curve. Room layout (not exactly to scale:b): Before FR (and before relocating 2nd sub): BFD config: After FR: Picture of very messy room: Now all I have to do is pull the TV out and plug the BFD in behind there and route the sub#2 speaker cable and I'll be done... at least until I get a front projector! Regards.