Ok, I'm going to try this again
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1.) SACD's use the analog interconnects only. The DA converter will send signal to the appropriate outputs on your SACD player. This depends on what type of SACD that it is. The music industry wanted to make sure that pirating would be more difficult if the audio was converted to analog before it leaves the player.
2.) All analog that leaves the player will come out the appropriate out put. Stereo SACD will only leave the front left and right outputs only (not the subwoofer). This is why you are not getting any low frequency signal to the subwoofer.
