I have a Pioneer VSX-S520 AVR. I've tried to use the onboard room correction a few times in each of the three places I've lived this year, to universally poor results. I tried manually adding in distance measurements, but even then the sound was jagged and thin. I got much better results by using direct mode and moving the subwoofer.

I mis-identified my sub in my original post; it is a SVS SB1000 Pro, not PB1000. I don't blame the sub for the poor bass; it sounded quite transparent and effective in other rooms. However, it could be the greatest subwoofer in existence, but I'd still dislike accommodating the thing and fussing with it.