"Someone" was right when they said that the Bose sub is integral to the sattelite's proper operation. You gotta work around it as best as you can.

FWIW, I don't think even Bose has the audacity to call that a "Subwoofer". Isn't it called a "bass module" or some such? ...big difference. A "Sub"woofer is designed to come into play below where the woofer starts to peter out, therreby the terminology "Sub", meaning "below".

Poneal was on the right track with his answer. You can ADD a sub to that system but you cannot replace that "bass box" that Bose considers a sub. ...as long as you do it from the speaker level side of the equation. Hook the real "subwoofer" up to the speaker outputs of the receiver and then hook up the entire Bose setup to the speaker outputs of the subwoofer as per Bose's directions.

Trying to bypass the Bose Bass Box (say that three times fast) and simply using the sattelites with a "real" subwoofer might result in the sattelites going up in a puff of smoke. I believe the bass box blocks (again, say that three times fast) prevents any lows from getting to the satelites.