Man.. talk about volume... My ears are ringing now... @ Boost 11 my whole apartment was shaking... not bad for a tiny little system. However I still could play the Z-5500 @ Boost11, with every volume setting turned up, my DGX on full blast, and I could still drown out the sound with my 12" PA system, but that isn't a suprise really, I'm more suprised over the power of the Logitech! I've found that when I set it to MUSIC, the surround speakers(far left and right) played sounds with excessive delay, that didn't sound pretty, when I put it to Stereox2 I got a cleaner sound, however I lost the center channel... any workarounds for this? would love to get 2x stereo from the left and right speakers, and a center/mono mix from the center channel, because then the center could function as a monitor.. is that possible?