Great sound, but I wish the earpads were thicker
This is my first open back headset and I'm very happy with how wide the soundstage is. The best way I can describe it is this: it no longer seems like all my sound is trapped in a cardboard box around my head. My previous headset was the Arctis Pro Wireless - I was happy with it for the convenience, but I never found it very comfortable for my large head. I was able to replace the earpads on it with thicker ones and could get by with that.
Despite sounding open, I wish the earpads on the PC 38X were thicker. My ears fit into the earpads ok, but then they touch the fabric across the drivers inside and it becomes annoying after a while. If I can find thicker earpads for these I will probably keep them, but if I can't then it might have to be a return for me.
One thing that might help new users like me: I have been used to wireless headsets for the past 20 years or so. In fact, I can't even remember the last wired headset I owned. Given that information, I also can't remember the last time I had to plug in a 3.5 mm audio plug to listen to audio on my computer. Make sure when plugging in the cable to your PC 38X and to your PC, you push the cables all the way in. On mine, it required more force than I thought it would. I spent about an hour after first getting these trying to figure out why I had zero sound. I finally realized that my cable wasn't plugged in all the way on both ends! I had to push pretty hard to get them into the jacks on the front of my Corsair case, and also had to push harder that I expected to get the cable into the earcup. Once they were all the way in, I got sound - what a relief!
UPDATE 11/14/20: One other thing I noticed after a few days of fiddling around: the sound quality really varies depending on what you plug them into - even between the rear jacks and front jacks on your PC. For example, when I tested the mic using the front jack on my PC, there was a lot of hiss/noise being recorded. However, simply by plugging the mic into the rear port of my PC, that hiss almost disappeared! So much so, that I may choose not to use a separate DAC/AMP after all. Although, I also tried plugging them into a GSX 1000 and in that scenario, there was absolutely no mic hiss audible at all, and the sound wave was perfectly flat in my recording software. All this may be something that most folks already know, but if you're new to non-wireless audio like I am, you may not realize these things make a difference.
UPDATE 11/18/20: After trying 4 different 3rd-party replacement earpads, I settled on the Dekoni Earpadz Jerzee model. You can find them on Amazon and they do a good job of fixing the comfort for my ears. I posted pictures and a mini-review of each one I tried, so just look at the pics I upload to the Drop website here and you can get the details.
Overall, I'm really impressed with how these sound and how they help me tell where enemies are coming from in Rainbow Six Siege. I paired them with a Sound Blaster X3 external DAC/AMP and am happy with my purchase. Thanks Drop! :-)
Would recommend to a friend.