I've tried the THX website plus the Denon website, and extensive searches on here and other forums to try and find some detailed information on how BGC works. I have the Denon KAVCA1SE and have a boomy bass peak at 50Hz. I have a BFD on order after reading about the great improvement the unit has made to many people's setups, but was wondering if someone could elaborate on BGC, as I do sit near the rear wall. The scant information I have seen claims that BGC reduces boom for near-wall listening positions. Does it do something clever or just reduce overall bass output?