[jclark003]

The sub-woofer module that tyersmoker is referring to should be below the port side couch/settee on the early 2000's 43 open. Lift up the forward cushion and there should be an access panel underneath with the sub-woofer below. The speakers all connect at that point. If you look carefully at the cube speakers you should see the wire run under a plastic cap on the mount stem.

And yes the Lifestyle receiver, most likely located in cabinet above settee, drives the speaker system and therefore needs to be on and playing some media. One of the sources (line 1 input I believe) on my Bose unit is connected to the output of the helm clarion system. So whatever is being played on the clarion can also be played on the Bose. Same with the TV.

Hope you figure it out.