Just picked up a 2 month old ZS, paired with Logitech z5300e's. Originally I installed everything on the application CD, but it seemed the more I tinkered, the worse it sounded. So I uninstalled everything and installed just the drivers. Games that support 3D audio aren't detecting the rear speakers whatsoever, and the volume on the rears seems low overall (in music, movies, games). To top it off, there are some intermittent crackling noises during certain parts of games. I believe everything is set correctly in control panel and the switch on the sub is on 5.1. Suggestions?