Recabled two pairs of DJ100s in the last few days.
I first listened to a DJ100 in an XB500 enclosure with a Mogami cable and the treble was extremely painful. Only during specific songs though. I don't think it was the cables fault because I now think Mogami is fairly neutral.
Too much air inside the DJ100 pads and it seems there is too much treble or something? Weird. I had the same thing happen when I used some SRH-840 pads on the DJ100.
I then tried an HD-650 cable (since it's a good match for the HD-598) and I got a severe loss of detail and the sound was much less clear. A tiny bit less fatiguing, but it made the sound a bit too dull. I eventually just came to the conclusion that the XB500 enclosure is not a good idea until I figure something else out. Maybe putting foam over the driver would help.
So I took my DJ100 in an actual DJ100 shell and recabled it with Canare Starquad. Awful wire choice for the DJ100! Adds too much excessive mid-bass and makes the whole sound less clear. I listened to it for an hour and hated it. Changed the DJ100 to something it's not. I don't really think Canare is very neutral. It does seem to be nice for AKG headphones if you need something to change a tiny bit.
Switched to the Mogami and it's perfect. I thought maybe it was boosting the mids/treble on my HD-598, but I don't believe this to be true now. Right now it seems very very neutral. With the DJ100 it makes the sound more clear and detailed without changing it's signature much really. No extra mid-bass or added treble etc. It's the Mogami W2534. This time around I was lazy and just drilled holes into my DJ100 instead of removing the stupid mono/stereo switch.
BTW I also bought the BeyerDynamic DJX-1. Has many similarities to the DJ100 (even the driver looks similar) but it was defective and I had to return it. It also works with the M50 pads. Strangely enough it also sounds like a DJ100 straight out of the box. I think both headphones need some burn in before listening to them.
Tonight I plan on getting some Dynamat and seeing if it does anything for the DJ100. Maybe. The other material I've used is a bit tricky because if you use it in the wrong area or too much it will alter the DJ100's sound too much.
I might recable my 2nd pair with Belden 1192A, but I don't want a DJ100 with a cable that's like a snake. That wire seems to offer the larger soundstage and the most detail, but I think it's less neutral than the Mogami. For interconnects it's kind of fatiguing. I sure wish all wire was really neutral, what a hassle