I know most of the sound is supposed to come out of the center channel but my issue is that there is very little of anything coming from the mains. I have Klipsch RF-51s for the mains and RC-52 for the center. When I check the levels on my receiver they are even but when I am watching something like lost on Dolby Digital I have to put my ear up to the main speakers and then I can faintly hear crickets chirping. Is this a common problem? Should I just crank up the mains relative to the center? Thanks.