I always appreciate follow ups even if they are very late so here goes.
I previously posted in the thread below some confusion with hooking up an Omni S8 sub-woofer and we could not figure out what the manual meant to say as it related to the actual back panel. Finally got an e-mail response from the folks at Omni. So if this info can help someone in the future here's how one would hook up the subby if they didn't want to use the rca sub in.
"In order to use the high level inputs of the OMNI S8 you would have to connect two wires to each output of the receiver. Then run one of the wires to the Subwoofer and the other wire from the output to the front speaker.
I apologize that the manual was misleading."
Hope that may help someone in the future.
http://forums.audioholics.com/forums/showthread.php?t=23483