Connecting Rythmik subwoofer to Devialet 120

[ogs]

@lal99  I am quite convinced @thumb5 is right about the stereo models. The speaker minus (black) terminals are common ground just like Linn advices. Only a bridged design (like Devialet mono-blocks) have both positive and negative active. Illustrated by the fact that speakers connect to the red binding posts on dual-mono. Devialet support should easily be able to confirm this.

Is that the correct way?

If you use  one subwoofer per channel you can go ahead and connect them without checking with Devialet. Yes, connect both the speaker and subwoofer to each amp terminal.