Can I replace the stock X1 cable with the BoomPro???
Absolutely. The stock cable is detachable on the X1, so you can use pretty much any cable you want.
Can I replace the stock X1 cable with the BoomPro???
Damn. Just when I was thinking about buying the cheaper CAL 2 or the PLYR1.......Absolutely. The stock cable is detachable on the X1, so you can use pretty much any cable you want.
The X1 is a noticeable step above the CAL, but for the price range, not much that compares to the CAL.
I assume you meant 770 pro 80s. The Pro 80s are efficient (as far as the 770/880/990 goes, it's the most efficient, even moreso than the 32ohm), but they STILL desire proper amping. The DG seems to be an internal soundcard version of the U3, which I can easily tell you is a VERY weak source. I don't recommend it on anything but the most sensitive of headphones. It has a crappy internal amp.
Both the X1 and CAL are efficient headphones, the CAL even more so. I suggest at least a portable amp for both, though for gaming purposes, it's not completely necessary. I dunno about the ZXR's output impedance which may alter the balance of the headphones negatively. may not be an issue overall, but it's possible. If you're gonna spend that much for an X1, don't do it a disservice by attaching it to underwhelming sources. The CAL is a safe bet for minimal amping, output impedance mismatch aside.
Thanks a lot for your time MLE. Can't wait to have a listen to the CAL.The CAL is a better sounding headphone. The PLYR1 is good with the extra benefit of being wireless. The CAL is GREAT, sounds better, and is more comfortable.