(As are most of the room correction programs built into AVRs).
All it does is put extensive DSP networks between the original recording and the listener.
If you want hear the soundtrack as it was supposed to be heard you do not want to re-route the bass away from the channels where it was recorded.
NB; the .1 channel is NOT a bass channel !
Its for low frequency sound effects, meaning its not always active.
DVDs that lumo all the bass into the .1 are simply WRONG and shouldn't be pandered to.
IIRC some of the uber-Denon and Pionner AVRs can manipulate the analogue MC input, so don't know how analogue they remain as such fiddling is usuallu done in the digital domain.
Most high end audio manufacturers follow the KISS prinicple, its about time home theatre did the same.
Physically putting your speakers in the correct position, setting them all to large and manually setting relative levels will pay bigger dividends than electronic fiddling.