Assuming you indeed have the DAC Magic and not the DAC Magic plus that can act has a preamp. Yon don't mention having a separate preamp or receiver or such.
Best advise would be to contact Bose which encourages one to do so with any special hook up connections. With the information you listed it sounds like you will need a way of adjusting gain/volume.
Best advise would be to contact Bose which encourages one to do so with any special hook up connections. With the information you listed it sounds like you will need a way of adjusting gain/volume.