Thank you all. I'm aware that the output jack is dual purpose.
The electrical stereo portion can't maintain a solid connection, so I have to rotate the B2 unit to maintain sideways pressure on the jack.
Never connect speaker outputs to anything other than speakers. Power output and impedance mismatch would damage the receiving equipment.
It wouldn't be practical to send it back for such a small thing as an intermittent jack, so I'm going to give the optical converter setup a try. Should arrive tomorrow.
If by some chance the optical portion of the jack is defective, I'll probably have to chat with tech support.
Douglas