I should have kept reading haha:
If you have a subwoofer and like lots of bass, it may seem logical to select LARGE for your front speakers and PLUS for the subwoofer. This
may not, however, yield the best bass results. Depending on the speaker placement of your room you may actually experience a decrease in
the amount of bass due low frequency cancellations. In this case, try changing the position or direction of speakers. If you can’t get good
results, listen to the bass response with it set to PLUS and YES or the front speakers set to LARGE and SMALL alternatively and let your ears
judge which sounds best. If you’re having problems, the easiest option is to route all the bass sounds to the subwoofer by selecting SMALL
for the front speakers.