After a year of non use, ive finally set up my Sierra 1's and Rythmik F12. However i am having a problem with the sub, kinda. I have a Audio DG DAC19 and NAD Amplifier.

This is how i have it set up.
I use the line-level out from DAC and connect to the line-level in on the sub. Then use the line-level out from the subwoofer and connect to the NAD.

When I try to play music, the Sierra 1's play fine but the F12 doesnt produce ANY NOISE whatsoever. I'm honestly stumped on what's wrong. Please help!