Are you sure this is what you're hoping for (stereo mode)?
Watch this video for an explanation of stereo vs dual mono setup.
https://www.youtube.com/watch?v=29ziwKUHS4I
Both methods work, but you might have a preference for dual mono setup. I suspect you would need a pair of passive splitters since you've asked about daisy chaining from one sub to the other. Basically, one splitter for each channel (1 in 2 out). Left side goes to left input channel on each sub, and same thing for the right side splitter to subs. Technical issues aside, I'm just letting you know there's another choice, and my feeling is most people choose dual mono for the reasons mentioned in the video link.
Watch this video for an explanation of stereo vs dual mono setup.
https://www.youtube.com/watch?v=29ziwKUHS4I
Both methods work, but you might have a preference for dual mono setup. I suspect you would need a pair of passive splitters since you've asked about daisy chaining from one sub to the other. Basically, one splitter for each channel (1 in 2 out). Left side goes to left input channel on each sub, and same thing for the right side splitter to subs. Technical issues aside, I'm just letting you know there's another choice, and my feeling is most people choose dual mono for the reasons mentioned in the video link.