A:Answer Joel,
I am not familiar with Bose speaker set-up you reference in your question. After reviewing the speaker inputs on the back of Denon receiver, I can see no speaker input that would support a 9-pin connection. You might want to contact Denon technical support but my suspicion is that a direct connection is not possible. However, they may know of a device that would take the subwoofer output and divide it among your surround speakers. Sorry, but I'm not very helpful on this question.
Bob