A couple weeks ago I noticed a lost of saturation whenever I had an aux cable connected to the headset, however, shifting the aux cable end (that goes into the headset) fixed the problem. I also noticed the aux cable end (of the headset) is pretty loose. It is starting to get annoying, so these are some things I did:
I tried a different aux cable and a different PC, but the aux cable end (of the headset) was still loose.
I made sure the headset was up to date in all software updates.