Weird

IMO, the usually level headed Jason is wrong here…do not attempt to disassemble the speakers!  Newbee is on the right track.  This is about room interaction and too much low bass energy when both active woofers are powered up. Try reducing the levels by a lot on both to see if you can get back to the same overall bass performance with both working as you have with one turned up higher. If you succeed with this you should benefit from lower distortion and more uniform response across seating positions. 

I may have solved the problem but I’m not absolutely sure.

I had the left subwoofer plugged into a cheap power hub and the right subwoofer plugged into the wall. Ironically it sounded better with the right power cord (the one plugged into the wall) pulled out.

I’m listening now with both plugged in the wall and I THINK it sounds fine.

Dear @rvpiano  : Looking to your speakers specs I read that the subs are controled by DSP software. Now, due that the subs goes to a deep low bass frequency as 13hz could be that you can help you to optimize your room/speakers quality performance levels at your seat position through and external DSP software/unit that can makes measurements about.

Just a possibility to improve what you already have.

Regards and enjoy the MUSIC NOT DISTORTIONS,

R.

I have a pair of GoldenEar Triton 1 speakers, which have built-in subwoofers. Evidently, the right subwoofer lead fell off the speaker
 

Unfortunately, the subwoofer only has a wall power connection.  No leads to reverse.

I’m confused. Did a wire fall off your subwoofer or not?

I have the grandfather speakers to your GoldenEar's

the Definitive Technology Mythos ST's that have powered subwoofers also

When l walk by to get a wobbly pop l aways lightly touch the drivers

and woofers of both speakers to make sure everthing is working 

Mine also has seperate volume controls and assuming yours also has the same and more with DSP Double check that everything is set in balance