I just bought the X-530 5.2 speaker setup from logitech. I previously had the Z-540 also from logitech. Both these speaker systems have a problem. There are in 5.1 channel mode and when my computer first starts up....the center speaker is distorted. It's distorted until I mute and unmute the center speaker in the audio software in windows (SoundMax). After doing that, the center speaker sounds fine. It happens every boot. I was wondering what "Sqap Center/Subwoofer Controls" in soundmax audio control panel means? My motherboard is a P4P800 Deluxe.