Guess what I did today? Check this out!!
It was rather easy, but soldering those wires to the ultra tiny solder points felt like brain surgery. Drilling a hole into the shell was super easy. On first try I scuffed the shell a bit..oops! This is now my 4th or 5th recable and my soldering skills are still just average.
It's a Mogami Mini Starquad with Techflex sleeving and some heatshrink tubing. I really wanted to heatshrink the exposed wires, but I didn't have any thinner heatshrink tubing and will have to get some.
I completely removed all the old internal wires and PCB. I hot glued the new wires inside the cups to hold them in place.
My only regret is not having a good pair of "Pants"(?) for the Y-split part. The only annoyance is that I had to manually cut off the plastic and metal braiding AFTER I got it installed because it was too short and like the cable was trying to strangle me. Now it's perfect.
People can say all they want about cables making zero difference, but I've heard it with my ears numerous times. The difference here is incredible. Call it overkill if you want, but it was 100% worth it. Right now I'm noticing a cleaner sound, more detail and even more/better bass. The stock cable is garbage in comparison.
I also use this with my HD-650 and noticed similar results. Strangely enough on the HD-650 with the Mogami I got the impression of a larger soundstage, but could have been my imagination. It usually takes me about one week to get a good idea of what a cable sounds like with a particular headphone, but the changes between the Mogami on the 598 are HD-650 are so similar. I love Mogami..Canare seems to only be good with treble happy/bass light headphones. I really love Canare with my K702.
Oh yeah...it only cost me under $15!