It seems that the bass from surround and -back channels is not heard from the sub, even when set to small (crossover 100hz). When i direct LFE/bass -output to my rather big front speakers (instead of sub) the bass for surround and -back is nicely output from front speakers as supposed. This seems to be the only way to get bass "from" surround/-back, no matter large-small and crossover-settings. Strange. Anyone with similar experience or suggestions?