I have a Denon 2802, set my speakers to small and crossover frequency set as 80 Hz. The general sound is quite tinny, I don't know if it's supposed to be like that (and it's just a matter of me getting used to it), or if I'm doing something wrong. I know what crossover frequency is, that means that al the bass below 80 Hz is directed to the subwoofer. When I set my speakers to 'large', the bass coming out of them is far richer. But then the amp asks me to select between LFE or LFE+Main for he sub. Is LFE related to crossover freq ? And what's LFE+Main? Sorry, but the manual that came with the amp isn't very user-friendly in explaining these things. Thanks.